Prusa I3 R2 EVO Carriage Jig - Dima per carrello

This is a carriage jig for owners of Prusa I3 EVO and Prusa I3 R2 V2.
If you break the glass plate, you need to dismount the carriage and use it to
calibrate the 4 angle holders. This is a very delicate operation, in fact if you
wrong the position and glue with CA, one or more of the 4 holders, it's pratically
impossible to mount again the plate on the carriage and if you try to remove a
glued holder probably you'll break the glass!!!
I create this tool because using it, you avoid to d