ANET A8 - TENSOR Y

Based on the design of YoshiCat (https://www.thingiverse.com/thing:2024293), I have updated this swivel or pivot tensor, I have tried to compact it, removing the screw tensor in the top, and using the 2 of the 6 holes on the front panel to implement the tighten function.

It is true that this type of tensor, the pivot tensor, doesn`t have a long travel, which is around 5-8mm, but in my opinion it is enough to achieve a properly belt tension.

This tensor is compatible with the front frame b