Here's a shot of the engine I did for our museum cut-away. To have an operational RC tank, you won't be able to make it look authentic unless you have a way to mold a 3D thin insert and even at that, I really don't think the end result would look all that good. There's not enough space to build in what you would need. That Torquematic tranny would be a bear to make. In front of it, on both sides of the huge radiator, were two oil coolers with pulleys and 16 fan belts.(under that flat armor plate). Unless you are making a static display, I'd leave the engine/tranny grilles closed. If you could get hold of a static WSN T-34, it may be possible to use some parts that do look "somewhat similar", but... My engine was made from a block of balsa and some 1;35 car engine parts. Not exact, but pretty close for the display I needed in a hurry. Opening one set on one side and making a hinge would be great for installing the on-off switch. My M-46 is set up like that. Hope this helps.