Here's a couple pics of the bench the bumper is on. Two 2x4's are attached to lengths of conduit that slide under the top.
Pulling out allows you to put a 4x8 sheet of plywood or whatever on the bench. The overlapping pull out supports act like saw horses to support the sheet you are cutting through. Attach casters to the legs so you can roll outside or wherever.
Don't set the saw too deep though. 1st time I used it I nic'd the conduit with the blade
