Hall Effect Sensor & Magnet Mounts

Hall Sensor Mount for OpenBuilds V-Slot Extrusion and C-Beam End Mount
12mm Magnet Mount for Blue Ox Solutions Spindle Mount

Solder / Filament Solutions Hall Effect Sensor
https://www.tindie.com/products/Kardacian/magnetic-sensor-hall-effect/?pt=ac_prod_search

Blue Ox Solutions Spindle Mount
https://www.ebay.com/itm/Designed-to-Order-Router-Spindle-Mount-for-OX-CNC-seen-at-Openbuilds/261607006495

Kyo C-Beam Sphinx Plates / Blue Ox 2" Taller Sphinx Plates
https://openbuilds.com/builds/c-beam-sphinx.3605/
https://www.ebay.com/itm/Deluxe-2-Taller-Kyo-Sphinx-CNC-4W-X-9-Plate-Set-seen-at-Openbuilds/253147904704

Mounting:
V-Slot Extrusion - M5 x 8mm Low Profile Screw and a T-Nut.
Front/Rear Mag Mount - Replace M5 x 27mm w/ M5 x 30mm Low Profile Screw
C-Beam End Mount - M5 x 15mm Low Profile Screw
Spindle Mount - M5 x 12mm Countersunk Screw

I haven't done anything to insulate the vias on the back of the board since the screw should sit slightly recessed. If you wish