Is there any conceivable way of putting 2 batteries inside the Tamyia KT? I've tried several things but so far, have not succeeded. Although I can physically install the batteries, the second one interferes with the turret rotation motor.

Has anyone managed to install the speaker more towards the rear? I think this might solve the problem. If so, how is the hull held down?

I want to give my KT the same running power as my Tiger.

Yes, you can do it!

I had the same issue with stick batteries, I ended up breaking up the second stick into a saddle style 4+2 pack to fit.

There are custom battery makers that can make non-standard arragements to fit!