Prusa MK3 Adjustable Y belt Tensioner

An adjustable tension-er for the y-belt. The oem setup of using the idler support attachment bolts to do tensioning let the belt wander a lot and it usually ended up bearing pretty hard against one side or the other of the pulley. I thought that it would be more stable if I could tighten up the mounting bolts to align the support. This necessitated a scheme to allow tension adjustment. I came up with this. It requires a pivot pin. I used a piece of 2mm carbon rod I had laying around. Piano wire