1:144 (~ N-Scale) Type 61 Tank from Gundam. Based on the papercraft model (with gracious permission from rizky) here: http://myhobbycraft.blogspot.com/2009/12/efgf-m61a5-main-battle-tank-135.html

I designed it to be largely printable in WSF on Sapeways - I don't have my 3d printer yet, so please let me know if there's something I can do to give it a better chance of printing! The fence and ladder are probably going to need support, and the wheels/treads may be challenging. I've added a recess to the hull and turret for a 1/8" x 1/16" cylindrical magnet so that it can rotate while staying attached.

File List:
Type-61-test is all the parts separated but in a single file.

Type-61_Full_Assembled is all the parts together in my assembly file, combined as 1 file.

Type-61_Hull is all of the hull parts in a single file. Type-61_Turret is all of the turret parts in a single file.

Type-61_Turret_Magnet is the turret without the cannons attached. Type-61_Cannons_Reduced are the cannons separately.

The rest of the parts are what you may want to print individually if the big file doesn't work out. Assembly of these parts should be pretty straightforward - most parts line up on edges, and there's protrusions for the cannons to square to.

If you're looking for a more simplified version, check out my other one here: https://www.thingiverse.com/thing:5153151