Thank you, the sliding option is one i hadn't considered. THe traps are hung up in the shed so I can't look at them right now, but I understand what you mean. It's my impression that if the levers are high enough you have a much better mechanical advantage, so if the offset is correct then the four coils must be primarily to speed up the trap - am I right? I admit "lots of pullouts" refers just a few in two years, but I had very few traps out, and it's disheartening to lose them when there is so much time and energy invested, especially for bobcats.
THis question arose in part because I have 2 dozen #2 Northwoods i would like to use for coyotes, but if they are going to be een slightly compromised in effectiveness I won't bother adding swivels and 4 coiling, I'll just start saving $
THanks for your help.