Im toying with the idea of making a spring loaded chain tensioner and was wondering if a) someone has made their own and might have a bit of advice for me (do's or dont's) or has it been tried and its a time waster or b)is there a thread out there I haven't came across about this engineering marvel (haha). I've got my own ideas rattling around in that empty bucket perched between my shoulder blades but if anyone has any info that would be hugely appreciated as I'm sure there would be quite a few better ideas than mine or something I could adapt to my concept, see how we go. Cheers everyone. Shiny side up people!!