Having some problems fitting large square lipos (SMC 5200/5400) into this car is there some tips or tricks to make it easier.

Have installed the 2mm top deck risers and required to grind down the front layshaft holder. The battery does not like to rest nicely into the stock plastic tray.

Does anybody have a suggestion on a better plastic lipo tray for fitment. Is there a part to replace the front layshaft holder that does not require modification as I have grinded mine quite severly.