diff --git a/bin/SimpleDeRez b/bin/SimpleDeRez
index 26a372f..281bcf9 100755
--- a/bin/SimpleDeRez
+++ b/bin/SimpleDeRez
@@ -16,7 +16,7 @@ parser = argparse.ArgumentParser(description='''
 parser.add_argument('resourceFile', help='file to be decompiled')
 parser.add_argument('-ascii', action='store_true', help='[!] guarantee ASCII output')
 parser.add_argument('-fakehdr', action='store_true', help='[!] save 225b file header as fake resource')
-parser.add_argument('-compcmt', action='store_true', help='[!] helpfully comment compressed resources')
+parser.add_argument('-extract', action='store_true', help='[!] extract Sys7-style compressed resources')
 parser.add_argument('-useDF', action='store_true', help='ignored: data fork is always used')
 
 args = parser.parse_args()
@@ -25,7 +25,6 @@ with open(args.resourceFile, 'rb') as f:
     resources = macresources.parse_file(f.read(), fake_header_rsrc=args.fakehdr)
 
 try:
-	rez = macresources.make_rez_code(resources, ascii_clean=args.ascii, cmt_unsupported_attrib=args.compcmt)
 	sys.stdout.buffer.write(rez)
 except BrokenPipeError:
 	pass # like we get when we pipe into head
diff --git a/macresources/main.py b/macresources/main.py
index 25bad16..b5b3a8c 100644
--- a/macresources/main.py
+++ b/macresources/main.py
@@ -168,10 +168,10 @@ class Resource:
             self._cache = CompressResource(self.data, self.compression_format)
             self._cache_hash = hash_mutable(self.data)
 
-    def _rez_repr(self, compression_savvy=False):
+    def _rez_repr(self, extract=False):
         # decide now: what raw data will we slap down?
         if self.compression_format:
-            if compression_savvy:
+            if extract:
                 attribs = self.attribs - ResourceAttrs._compressed # will this work??
                 data = self.data
                 compression_cmt = self.compression_format
@@ -407,7 +407,7 @@ def make_file(from_iter, align=1):
     return bytes(accum)
 
 
-def make_rez_code(from_iter, ascii_clean=False, cmt_unsupported_attrib=False):
+def make_rez_code(from_iter, ascii_clean=False, extract=False):
     """Express an iterator of Resource objects as Rez code (bytes).
 
     This will match the output of the deprecated Rez utility, unless the
@@ -421,15 +421,19 @@ def make_rez_code(from_iter, ascii_clean=False, cmt_unsupported_attrib=False):
 
     lines = []
     for resource in from_iter:
+        data, attribs, compression_cmt = resource._rez_repr(extract=extract)
+
         args = []
         args.append(str(resource.id).encode('ascii'))
         if resource.name is not None:
             args.append(_rez_escape(resource.name.encode('mac_roman'), singlequote=False, ascii_clean=ascii_clean))
-        args.extend(x.encode('ascii') for x in resource.attribs._for_derez(cmt_unsupported=cmt_unsupported_attrib))
+        args.extend(x.encode('ascii') for x in attribs._for_derez())
         args = b', '.join(args)
 
         fourcc = _rez_escape(resource.type, singlequote=True, ascii_clean=ascii_clean)
 
+        if compression_cmt: lines.append(b'/* Compression: %s */' % compression_cmt.encode('mac_roman'))
+
         if resource.type == FAKE_HEADER_RSRC_TYPE:
             lines.append(b'#if 0')
         lines.append(b'data %s (%s) {' % (fourcc, args))
@@ -437,7 +441,7 @@ def make_rez_code(from_iter, ascii_clean=False, cmt_unsupported_attrib=False):
         step = 16
 
         star, slash, dot, space = b'*/. '
-        whole_preview = bytearray(resource.data)
+        whole_preview = bytearray(data)
         for i in range(len(whole_preview)):
             if not i % step: mode = False
             thisone = whole_preview[i]