Vanhao i3 Z-axis offset

I recently got hold of a Wanhao i3 v1 printer, and when I upgraded it with a Glass plate on the printbed, I needed to correct the Z-axis. It seems the normal way to do this is to physically move the Z-axis endswitch. That's too much work for me, so I designed this clip. It should fit snugly onto the metal frame right above the switch and add about 4mm of offset.
No drilling, no screwing.
There really shouldn't be any critical settings for printing.