The majority ofmy parts are machined from 3 1/2" X 1/2" aluminium bar so I made my own
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Basically Ali tooling plate base - 10 X 20 BDMS bar at back and adjustable clamps (actual clamp is 6 X 20 MS bar and the stops/adjusters from the 10 X 20 BDMS)
Works a treat but I don't know if it will hold 6mm thick stock.