My Google SketchUp program prompted me to upgrade today. I use
the free version (non-pro). As a result, my DP baseboard model I
designed last weekend took on more of x-ray look. Its the "edges"
feature, that lets you choose whether you see them or not. Check it out
if you like. In my last version you couldn't see the wheels the same
way you do he

http://web.newsguy.com/MySite/

There's probably other new features. I just thought I would mention the
new version. If you've been waiting to get on-board with
SketchUp, this might be a good chance! I've used (my dad's) T-square
before--and I like this better! For the time being at least, it's still
free. Watch a few tutorials and build a few boxes in minutes...then
build a house, with windows, doors, a fence, etc. After a dozen tries,
and perhaps a little reading, you can do it all in a minute (can't do
that with your T-square, no?). If you don't want to do it, don't let me
try to push you into anything--that was just my little motivational
talk! Have fun!

Bill