Originally Posted by 5teve
The pan head screws that are used to hold the vertical arm onto the lower plate actually have a bit of adjustment to them.
them pan head screws are likely the most stressed points in the design I think - I'd be inclined to get the best quality ones you can. Only other area I'd suggest might need beefing up is the threaded aluminium for the swing arm doesn't have a lot of threads for the load you'll be putting on (and every time you tighten it up) if needed you can always suppliment this with a captive steel nut.
Great work with the drawings!
canon camera stuff, canon lenses, Manfrotto "thingy", 1D MK II converted for IR
TF posting: here