Diode Laser machine Adjustable Leg

A simple adjustable leg for a diode laser machine built with 2020/2040. It has 120mms of adjustment. I have not yet built this, so use at your own risk. The adjustment knob is designed for 1/4-20 bolt. there is a space for a captive nut in the cap. I would recommend cutting a strip of metal to slip between the bolt and leg.