Thanks Jason. I used the carbon pivot plates from a 12M as a base for my ones, which I shaped to help keep the LiPo in place. So, from the bottom of the chassis upwards, each screw (4 in total) goes through the chassis, then a washer (which acts as a spacer), then a nut and then through the carbon plate. A stand-off then screws down on the top of the same screw and then the carbon top plate screws down onto that stand-off. There are 4 of the screws to keep everything tight and keeps the whole setup quite stiff. If you notice in the pics, you'ull see the 4 screws going through the chassis that line up with the 4 screws that go down through the top plate.

Cheers, Chris.