It might be a whole bunch faster to simply use 3 mm rods and flat bar. You would need to spot weld them and clean it up, but you can do a pair of long rods and lots of flat bars all in one part like a ladder. Then cut them into the correct length in sections. With the right jig, you could turn out bunches of them pretty quickly.
Very little waste this way and it would be nearly as strong as if you milled it out of one piece.
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Lee |