Bracket to mount a hall effect Z axis end stop to a Print Rite Printer.
Clips straight onto the micro switch mount, and connects straight to the main board with no modifications needed

This is the one I used-

http://www.ebay.com.au/itm/321245075354?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Much more stable & accurate than the micro switch.
Hardly ever needs adjustment once set up.

Print Rite

No

No

20%

After printing clean out the two holes so that it fits into the clips.
Slide in the hall effect sensor it will clip into place, and connect it to the main board Z-Axis plug, watching the polarity.
I replaced the adjustment screw with a M5 Brass one (or nylon) and glued the 3mm magnet to the bottom. Make sure you have the magnet around the right way.
Test the operation.
Enjoy!