Interested to hear how you get on with the induction heater. Nearly bought one last summer, but they were around the £400 make. Didn't think to check the Ching Chong sellers....
Well if you hold a bolt in a pair of pliers the coil will get it cherry red. That's as far as I have gone so far. They are quite fragile - you can break them if you use it with no coil, nothing in then centre of the coil or use it for too long in one go. However for me it's to release those corroded nuts and bolts that might otherwise shear so it'll get occasional strategic use. The big one I have in mind for it is to free the track rod adjuster on one of my cars, in that case I need to unwind and rewind the coil around the track rod. I'm not sure it'll have the welly to do it but I'll have a go, I know I couldn't free it with anything else. Mine is supposedly 1300W.
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