Battery tray for high ground clearance ladder chasis (truck v3 from Mr. Crankyface)

The new ladder chassis has the links ends placed higher than the original. To avoid interference with battery tray and also allow water drainage, the battery tray design was updated.

New ladder chassis: https://www.thingiverse.com/thing:3640302

This is for Mr. Crankyface truck v3, you can find the whole design here: https://www.thingiverse.com/MrCrankyface/collections/printed-rc-truck-v3