About this 3D model

A pair of these will hold a 26 cm spool above a Mendel using a 8mm smooth or threaded rod as an axle. They are kind of long (~195 mm), and work best with PLA. The supported spool is more stable if the two supports are tilted toward each other. I was going to make clamps to hold the supports to the top pair of rods on the mendel, but it turned out that the weight of the spool was sufficient.