Just a simple X-axis endstop for the lowrider cnc using cheap endstops and (2) M3x10 and (2) M3x20 bolts that thread into the PLA.

The endstop that I used has a little roller on it, but I'm sure the one linked below should work just fine as well: https://www.amazon.com/CHENBO-Endstop-Mechanical-Switches-Printer/dp/B01CS82B8K/ref=sr_1_3?dchild=1&keywords=end+stop+3d+printer&qid=1618461854&sr=8-3