I can now cross off that top item on that list. Its taken 20x steel roofing brackets, 5x M10 threaded bar (which need adjusting) and 76x M6 bolts(!!!) but the main bulk of the robot is now done.

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I need to get it on the scales but I think this now tops 30kg. Next job is adjusting the threaded bar holes and adding on the polycarbonate panels to the robot (along with the wheels of course).