Anet A8 X tensioner

I got tired of replacing the weak idlers so designed this tensioner to use larger roller bearings. Use a motor gear, 5 mm shaft, and 5X13X4 bearings. Shat will need to be cut flush with out side of bearings using cutoff wheel. A Dremel cutoff or similar will work. Also a longer belt will likely be required. This is a remix of: https://www.thingiverse.com/thing:2507473.

Bearings:

https://www.amazon.com/5x13x4mm-Precision-Bearings-Rubber-695-2RS-BU/dp/B00ZVF8J3O/ref=sr_1_3?ie=UTF8&qid=15