I have a 6" x 10" x 6' steel tube, that i use as a true work bench,
the only take down that i have built i put the limbs on the riser, made sure all was square, by flipping the bow from left side to right side, and splitting the difference, tightened it up. and using a pencil and the right sized wooden block- i scribed a center line down the whole rig( masking tape on back)