Hesine 3D induction sensor mount - 12mm & 17mm

This is an induction sensor mount specially designed for my Prusa i3 model (M505 5th generation from vendor Hesine 3D on aliexpress), but i guess it can be used on other models as well (Anet A8) . I was planning to use this design: http://www.thingiverse.com/thing:671600 but it did not fit on my printer.

The two screw holes are spaced for a 40mm fan.
On my model it fits nicely between the 40mm fan and the heatsink, so there is no need for longer screws.
The main hole is the perfect dimensio