I am thinking about building my own 84mm with scissors using a Cadet or a Bantam, since I already have a spare pair of 84mm scissors (sent back with repaired 84mm Craftsman). But, the scissors have a crude repair (missing screw replaced with brass pin--and I'm betting that crude repair resulted in stripped screw threads, so they might be unfixable; thus why Victorinox replaced them entirely on my Craftsman) and the spring is missing as well. And, obviously, I don't have a backspring.
What can these scissors ride on, since I don't have an 84mm scissors spring? Taking apart an 84mm with scissors in it already is far out of the question.