BajaBoard S2 Battery Compartment Spacer for 6S 6000mah prismatic cells. Increases the Z depth by 1/2". I was able to squeeze in 1220wh capacity with the vesc based motor controller. Youll have to drill out your own holes bigger than the bolt size for clearance. Print 4 of these, super glue them together and add a layer of 1/16 to 1/8 thick adhessive backed foam between your board and the chassis. (on either side of the spacer)