belt tensioner for rostock max

My timing belts were scooting over and rubbing against the side of the idler bearings. It wears out the belts and can make a howling sound.

The solution is to make sure the bearing is level, but I was having a hard time simultaneously tightening the screw, holding the nut, applying upward pressure to the bearing and making it perfectly level.

Others have machined solutions similar to this, or used mirror clamps. I wanted to try something I could print.

Note: On my kit, the holes in the