Occasionally I would overshoot the bed by a few mm, causing my PEI sheet to catch on my nozzle brush and causing a ruckus. Made a small bumper to stop me from doing that. As it sits right against the heated bed, print in ABS or something else a bit heat resistant, attach with M3x8 and a roll-in or hammerhead nut.
The author marked this model as their own original creation.