...In the original photo the hinge mechanism (that you subsequently drew up) *looks* like it's an inch thick, which seems like overkill. Is this the part you're referring to? https://dl.dropboxusercontent.com/u/84843025/Image%20Cache/ClampDraft%20-%20HingeHighlight.jpg I made that 24mm wide. The hi...

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Thanks Mick. Welding on nuts is a good idea. I also did a search for "welding test clamp" but I'm afraid I didn't find anything too useful :( I did however then break out Google's SketchUp and managed to draft my own :D https://dl.dropboxusercontent.com/u/84843025/Image%20Cache/Clamp.jpg h...

I did a short course in welding recently which I found most useful. One of the things I was impressed by was that each of the welding bays had a clamp/vice thing which was really good for holding your work at any height or angle. I'm wondering where I could get such a device from: https://dl.dropbox...