Hey guys, here is a design for a spool bracket system for filament spools. The left, taller unit is the stanchion. The middle circle represents a skate bearing that fits into the centering cones on the right. Everything fits onto a 1/4 inch smooth rod and any size spool will fit on the cones (you need four of each assembly). As long as the rods are long enough, any width spool will fit. What do you think?