Summary

A tiny modification for Printbox3D One, a Russian 3D printer. It gives 3 more centimeters on the Y axis, giving a maximum of 190 x 190 printbed.

Instructions

Requires four holes in the Y axis base (see pics attached).
Also, you must unscrew two M4 stopper screws at the bottom of the plate so that Y axis can go further than in the original design.

Uses four M3 30mm screws for holding itself and the belt. The belt may have to be retightened after installation, you'll have to unscrew the Y stepper a bit(!), and tighten it back while pushing it down.

After installation ask Printbox3D support to give you the firmware source code (it's Sprinter firmware) and modify Y axis length to fit the bigger size.

Printbox3D "Plus 3" Mod