The old B&J 8x10 came with pressed steel inserts (1/4- 20) in several places on the bottom. I change locations due to focal length, lens choice, bellows extension and balance. Still need to get an outrigger leg for the front bed on those long bellows shots that take forever. Would also like to replace the inserts with a 3/8" size instead. When one of the 1/4" ones pulled out during a shot, I mixed some epoxy and potted them in place. They don't pull loose now, but they are somewhat perminant. tim