Tevo Tarantula Y Tensioner for LACK table

Compact size Tevo Tarantula Y tensioner for LACK table

Updated the design:
1. change the wall height of the side plate to 4 mm
2. lower the tensioner to the bottom by 5 mm

Update the design:
1. move the slot that hold the end plate lower so that the belt can move freely.
2. add knob