I used 40x80 extrusion, most recommend 45x90 but this size was more availible for me.
If doing it again I would order 45x90 :)
Connected the profiles with t nuts in one extrusion. Then drilled through the other to be able to screw it together. Thought this would make a nice 90degree angle all by itself but I was misstaken! Have since loosened the bolts and retightened them while checking with a engineers square.. now I have a much better alignment!
Ofcourse the endplates help. Had them milled by a happy forummember with accurate hole placement for easy alignment.
Hope to get some free time soon to continue with the build ;) Christmas period has been hectic!!
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