2x8 walls and 23/32 plywood
Liner, measure and straight edge
Drywall square and some math
Folded, positioned and clamped
Yellow crayon to mark bulkhead hole
Metal rack decking holes cut for plumbing
Bulkheads and common manifold
Don't silicone the manifold on until it's on the rack
In place, just needs 20 minutes of plumbing to the main supply and drain line