Bear Y Idler with Tensioning and Y Motor Mount with Extra Mounting Hole

These two parts are for the Bear Upgrade.
- The idler is based on MattyVee's mk3 design. My version has been changed for the Bear frame and uses a 20T idler. The idler is located in the same position as the original Y idler. This idler has also been changed to be adjustable from the inside and not under the frame. An M3S thin nut needs to be added to the pocket in the mount and an M3 35mm bolt goes through the hole in the arm and threads into this nut, that swivels in it's pocket.

- The mo