It wasn't a quick swap as I had hoped. The first issue was rewiring the plugs for the Taigen daughter board.
The second difference is the elevation unit. The Mato one would not cycle the gun up and down. It would just stop.
Turns out they did this.

Can't cycle all the way when you put a bump stop in there... Yeah, it got cut out.

Next "problem" is that the Mato trigger switch operates exactly opposite that HL/Taigen's does. But, it's too late in the evening so I'll just not have cannon sounds. This wont be this tank's main turret anyway.
Well after many a tear down, I give you my M4A3 76!
