Mk3 style Y belt holder for Prusa Mk2.5 / Mk2 / Mk2s [Mk42/Mk52 12v heatbeds]

[https://www.printables.com/model/35703-mk3-style-y-belt-holder-for-prusa-mk25-mk2-mk2s-mk]

Edit: Don't bother with this. Instead use Prusa's new Mk3s 2-piece design with integrated belt tension adjustment which will work on Mk2 and above printers. See "Y-axis parts: here:
https://shop.prusa3d.com/forum/general-discussion-announcements-and-releases-f61/new-printed-parts-c1-r4-mk3s-mk2-5s-mmu2s-t27888.html?sid=c6442c7f90151ff3df9a1e820c2ae0a3

Wr125x's Y-belt holder was a little too tight for one of my Mk52 12v heatbeds, So I elongated the bolt hole closest to the front of the printer by ~1.5mm while keeping the other hole circular. This model ought to install on all generations of the Mk42 and Mk52 12v heatbeds.

Advantages over Mk2/Mk2s design:

• consistent with Mk3 design which is what Prusa determined is more reliable in their lab
• quicker install/assembly
• more stable since one hole is circular rather than elongated

Disadvantages over Mk2/Mk2s design:

• cannot adjust end stop location since holder cannot slide with respect to heat bed