Fixed bed level mounts for OLP

Mounts to keep the level of the heated bed at a maximum of 18mm. The original springs must stay in place but the screws can be loosened. The springs keep the buildplate pushed to the 18mm mounts, so it never rises above 18mm. At the same time the springs allow downward movement to keep the printhead from destroying itself or the glass buildplate.

Remarks for foto's
1) printed mounts
2) mark the spot using a 4mm drill (opposit side of spring in front of each printtower)
3) drill a 3mm hole (the biggest drill i could fit in my dremel)
4) widen to 4mm (did it by hand, the OLP's plastic is not that hard)
5&6) place the washers (18mm diameter, 1.5mm thick, 2 pieces for each mount)
7&8) mount and fasten inside bottom construction (there can be very little room)

Then manually calibrate the bed using g-codes (see dreammaker forum, thanks Louis).
And it has been level for over 2 months now!

I myself reversed the screws (unscrew from the top and insert them from the bottom) so th