Prusa i3 T3Steel Toolson Edition PCB Pen Holder

Pen holder for Prusa i3 by Toolson. Magnetically connects to X-Carriage M4 bolt heads from the back.
Uses 8x3mm neodymium magnets. It is good to glue soft fabric into the pen bed (see images).
Use any small adjustment nut fittings from thingiverse, m3-nut sitted under the magnets (hot melting) and m3 threaded rods cut to fit the pen.
You can use the rubber band and not tightening the screws all the way to make the pen slide in the holder to protect the tip.