diff --git a/src/gerbonara/cad/kicad/graphical_primitives.py b/src/gerbonara/cad/kicad/graphical_primitives.py
index 29ff9b3..f62b0ef 100644
--- a/src/gerbonara/cad/kicad/graphical_primitives.py
+++ b/src/gerbonara/cad/kicad/graphical_primitives.py
@@ -1,6 +1,8 @@
 
 import string
 import math
+import base64
+import textwrap
 
 from .sexp import *
 from .base_types import *
@@ -325,13 +327,28 @@ class DimensionStyle:
     keep_text_aligned: Flag() = False
 
 
+@sexp_type('data')
+class Base64Blob:
+    @classmethod
+    def __map__(kls, obj, parent=None, path=''):
+        _data, *content = obj
+        for x in content[:10]:
+            print(str(x))
+        return base64.b64decode(''.join(map(str, content)))
+
+    @classmethod
+    def __sexp__(kls, value):
+        encoded = base64.b64encode(value).decode()
+        yield [Atom.data, *textwrap.wrap(encoded, 76)]
+
+
 @sexp_type('image')
 class Image:
     at: AtPos = field(default_factory=AtPos)
     scale: Named(float) = None
     layer: Named(str) = None
     uuid: UUID = field(default_factory=UUID)
-    data: str = ''
+    data: Base64Blob = ''
 
     def offset(self, x=0, y=0):
         self.at = self.at.with_offset(x, y)
diff --git a/src/gerbonara/cad/kicad/schematic.py b/src/gerbonara/cad/kicad/schematic.py
index 0727c45..48eadf4 100644
--- a/src/gerbonara/cad/kicad/schematic.py
+++ b/src/gerbonara/cad/kicad/schematic.py
@@ -85,6 +85,12 @@ class NoConnect:
                    fill='none', stroke_width='0.254', stroke=colorscheme.no_connect)
 
 
+@sexp_type('bus_alias')
+class BusAlias:
+    name: str = ''
+    members: Named(Array(str)) = field(default_factory=list)
+
+
 @sexp_type('bus_entry')
 class BusEntry:
     at: AtPos = field(default_factory=AtPos)
@@ -171,6 +177,24 @@ class Polyline:
         yield _polyline_svg(self, colorscheme.lines)
 
 
+@sexp_type('circle')
+class Circle:
+    center: Rename(XYCoord) = field(default_factory=XYCoord)
+    radius: Named(float) = 0.0
+    stroke: Stroke = field(default_factory=Stroke)
+    fill: OmitDefault(Fill) = None
+    uuid: UUID = field(default_factory=UUID)
+
+
+@sexp_type('rectangle')
+class Rectangle:
+    start: Rename(XYCoord) = field(default_factory=XYCoord)
+    end: Rename(XYCoord) = field(default_factory=XYCoord)
+    stroke: Stroke = field(default_factory=Stroke)
+    fill: OmitDefault(Fill) = None
+    uuid: UUID = field(default_factory=UUID)
+
+
 def label_shape_path_d(shape, w, h):
     l, r = {
         Atom.input: '<]',
@@ -578,12 +602,28 @@ class TextBox(TextMixin):
         yield from gr.TextBox.render(self, variables=variables)
 
 
+@sexp_type('comment')
+class TitleComment:
+    @classmethod
+    def __map__(kls, obj, parent=None, path=''):
+        return '\n'.join(obj[2::2])
+
+    @classmethod
+    def __sexp__(kls, value):
+        l = [Atom.comment]
+        for i, line in enumerate(value.splitlines(), start=1):
+            l.append(i)
+            l.append(line.rstrip('\n'))
+        return l
+
+
 @sexp_type('title_block')
 class TitleBlock:
     title: Named(str) = ''
     date: Named(str) = ''
     rev: Named(str) = ''
     company: Named(str) = ''
+    comment: TitleComment = None
 
 
 @sexp_type('lib_symbols')
@@ -597,8 +637,11 @@ class Schematic:
     _version: Named(int, name='version') = 20230620
     generator: Named(str) = 'gerbonara'
     generator_version: Named(str) = __version__
+    legacy_generator: Named(Array(str), name='host') = None
     uuid: UUID = field(default_factory=UUID)
     page_settings: PageSettings = field(default_factory=PageSettings)
+    legacy_page: Named(Array(int), name='page') = None
+    legacy_paper: Named(str, name='paper') = None
     title_block: TitleBlock = None
     # The doc says this is expected, but eeschema barfs when it's there.
     # path: SheetPath = field(default_factory=SheetPath)
@@ -607,12 +650,14 @@ class Schematic:
     no_connects: List(NoConnect) = field(default_factory=list)
     rule_areas: List(RuleArea) = field(default_factory=list)
     netclass_flags: List(NetclassFlag) = field(default_factory=list)
+    bus_aliases: List(BusAlias) = field(default_factory=list)
     bus_entries: List(BusEntry) = field(default_factory=list)
     wires: List(Wire) = field(default_factory=list)
     buses: List(Bus) = field(default_factory=list)
     images: List(gr.Image) = field(default_factory=list)
     polylines: List(Polyline) = field(default_factory=list)
-    circles: List(gr.Circle) = field(default_factory=list)
+    circles: List(Circle) = field(default_factory=list)
+    rectangles: List(Rectangle) = field(default_factory=list)
     texts: List(Text) = field(default_factory=list)
     text_boxes: List(TextBox) = field(default_factory=list)
     local_labels: List(LocalLabel) = field(default_factory=list)
@@ -620,7 +665,7 @@ class Schematic:
     hierarchical_labels: List(HierarchicalLabel) = field(default_factory=list)
     symbols: List(SymbolInstance) = field(default_factory=list)
     subsheets: List(Subsheet) = field(default_factory=list)
-    sheet_instances: Named(List(SubsheetCrosslinkSheet)) = field(default_factory=list)
+    sheet_instances: Named(Array(SubsheetCrosslinkSheet)) = field(default_factory=list)
     symbol_instances: Named(Array(SymbolCrosslinkProject)) = field(default_factory=list)
     embedded_fonts: Named(YesNoAtom()) = False
     _ : SEXP_END = None
diff --git a/src/gerbonara/cad/kicad/sexp.py b/src/gerbonara/cad/kicad/sexp.py
index 9312489..edc31c2 100644
--- a/src/gerbonara/cad/kicad/sexp.py
+++ b/src/gerbonara/cad/kicad/sexp.py
@@ -64,7 +64,7 @@ term_regex = r"""(?mx)
         (\))|
         ([+-]?\d+\.\d+(?=[\s\)]))|
         (\-?\d+(?=[\s\)]))|
-        ([^0-9"\s()][^"\s)]*)
+        ([^"\s()][^"\s)]*)
        )"""
 
 
diff --git a/src/gerbonara/cad/kicad/symbols.py b/src/gerbonara/cad/kicad/symbols.py
index ede2a7c..c742e08 100644
--- a/src/gerbonara/cad/kicad/symbols.py
+++ b/src/gerbonara/cad/kicad/symbols.py
@@ -26,7 +26,7 @@ from .primitives import kicad_mid_to_center_arc, Margins
 
 PIN_ETYPE = AtomChoice(Atom.input, Atom.output, Atom.bidirectional, Atom.tri_state, Atom.passive, Atom.free,
                        Atom.unspecified, Atom.power_in, Atom.power_out, Atom.open_collector, Atom.open_emitter,
-                       Atom.no_connect)
+                       Atom.no_connect, Atom.unconnected)
 
 
 PIN_STYLE = AtomChoice(Atom.line, Atom.inverted, Atom.clock, Atom.inverted_clock, Atom.input_low, Atom.clock_low,
@@ -251,11 +251,19 @@ class Circle:
                   **self.stroke.svg_attrs(colorscheme.lines))
 
 
+@sexp_type('radius')
+class ArcRadius:
+    at: AtPos = field(default_factory=AtPos)
+    length: Named(float) = 0.0
+    angles: Rename(XYCoord) = field(default_factory=XYCoord)
+
+
 @sexp_type('arc')
 class Arc:
     start: Rename(XYCoord) = field(default_factory=XYCoord)
     mid: Rename(XYCoord) = field(default_factory=XYCoord)
     end: Rename(XYCoord) = field(default_factory=XYCoord)
+    radius: ArcRadius = None
     stroke: Stroke = field(default_factory=Stroke)
     fill: Fill = field(default_factory=Fill)
 
@@ -419,13 +427,13 @@ class Property(TextMixin):
 
 @sexp_type('pin_numbers')
 class PinNumberSpec:
-    hide: Flag() = False
+    hide: Named(YesNoAtom()) = False
 
 
 @sexp_type('pin_names')
 class PinNameSpec:
     offset: OmitDefault(Named(float)) = 0.508
-    hide: Flag() = False
+    hide: OmitDefault(Named(YesNoAtom())) = False
 
 @sexp_type('text_box')
 class TextBox:
diff --git a/tests/test_kicad_symbols.py b/tests/test_kicad_symbols.py
index 2df9784..8553a37 100644
--- a/tests/test_kicad_symbols.py
+++ b/tests/test_kicad_symbols.py
@@ -98,6 +98,14 @@ def test_round_trip(kicad_library_file, tmpfile):
                 j += 1
                 continue
 
+        if original != stage1:
+            # Make pytest output more useful error messages
+            context_original = original_lines[max(0, i-10):min(i+10, len(original_lines)-1)]
+            context_original = '\n'.join(context_original)
+            context_stage1 = stage1_lines[max(0, i-10):min(i+10, len(stage1_lines)-1)]
+            context_stage1 = '\n'.join(context_stage1)
+            assert context_original == context_stage1
+
         assert original == stage1
         i, j = i+1, j+1