ELMOD makes a controller for the larger models.

I would check with RCTANKWARS.Com. Phil might be able to hook you up. For sound you may want to look up Bendetti (sp) he has many items for the bigger boys.

Some items though you are going to have to DIY. If you succeed (and no reason you won't) share it with us please. If things don't go so hot share that with us also as it will be a great learning tool.

Good luck with a great project! I was the commander of a M1A1.

BEst

Don