Here is a dumb little 15 minute project (1:57 at 20x speed). I had a worn chain and sprocket from a client’s bike, so I figured I could use these to build a TIG torch holder.
There was no planning and no design work, so you see me improvise along the way. I’ll probably improve on this and make another one soon. It needs more weight at the rear to offset the weight of the TIG torch cable which tends to tip the stand over. But it only cost a couple of bucks in welding gas and leftover spray paint, so the experiment was a bit of fun.