For some garbage depth, check out Donnie Thompson's 1,260-lb suited squat from 2011:
As I said, I can squat [or was able to squat] around the 405 range with ass to the grass form, and skinny as hell legs.
Give me all that equipment and a depth requirement that high, and a bit of specialized training, and I think I could confidently get half what Donnie did there [630-lb].