Nice to see some more work on this.
Chirone, your tank is coming together nicely. I hate using booleans. For the wheel I would have just created a sphere, chop it in half. scaled it in, then extrude the outer edge out then back.
looking forward to more.
www.stevenegan-cgi.com
"Your weapons are no match for ours! People of Mars, surrender!"
"Um, this isn't Mars. This is Earth."
"Earth? Earth-with-nuclear-weapons Earth?"
"Yes."
[long pause] "Friend!!"