Added the cardboard heat sheild.

Tweaked the X belt length and the cable strip length.
Now generates PDF versions of the sheets using Inkscape.

InkCL.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python
+#from http://kaioa.com/node/42
+
+import os, subprocess, sys
+
+def run(*args):
+    print "inkscape",
+    for arg in args:
+        print arg,
+    print
+    run = subprocess.Popen(["inkscape"] + list(args), shell = True, stdout = subprocess.PIPE, stderr = subprocess.PIPE)
+    out,err=[e.splitlines() for e in run.communicate()]
+    return run.returncode, out, err
+
+if __name__=='__main__':
+    r = run(sys.argv[1:])
+    if not r[0]==0:
+        print 'return code:',r[0]
+    for l in r[1]:
+        print l
+    for l in r[2]:
+        print l