I couldn't find any suitable box, channel or I beam to make the uprights out of. So I settled on the 200mm x 200mm box I already had and decided to reinforce it instead. I did this by slipping two lengths of 180mm x 75mm taper flange channel inside each upright. this increased the wall thickness to 14mm.
Next step was to bolt on the horizontal channel. I decided on 8 7/8th UNF bolts at each end of the channel. I used imperial bolts because they were cheaper and I had a 22mm annular cutter for my mag drill. The frame was squared up, measured diagonally to confirm, one bolt hole was drilled and a bolt installed before checking it was square again. then I drilled the remainder of the holes, installing the bolts as I went.
The press was flipped and the process started again, ensuring everything was still perfectly square.
Once the top channels were installed I stood the press back up and basked in its glory
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