This is my masterpiece !
it has a scale reaching about 1:18 (~37,5 cm long).
A lasercut KV-1 that has a hollow space at the rear to put some motors for the rearwheel drive. I designed it to fit with some Opitec motor kits, with a NodeMCU to control it.
The red pathes are cut-engraved (fast and not powerful) and the black pathes are cut (slow and powerful).
See also my Panzer IV G, my StuG III Ausf. F, my Sherman, my B1 bis, or my Jagdtiger.
Instructable available here .