This is a Minitrains F&C 0-4-0 chassis with a TCS KAM4 decoder. It’s a nice decoder with a pretty impressive stay alive.

I think I can fit it under the body of the O9 loco I’m making, with one small modification to the chassis.

I removed the metal chip with the raised edges and replaced it with a flat piece of plasticard. This will enable the chip to sit a little lower on the chassis and fit under the boiler of the loco body.