Bob,the chain and clevis were put on the longspring end of the trap,because that is how I wanted them made.
I never liked the chain on the trap frame end,when trapping rats,the excess chain,allowed rats or mink several inches of movement.Most of the time they used this to move a bit up onto the rat houses,instead of being kept in the water and deep sixing.I also had the delay pin removed.
I have never been a believer in the need to move the chain to the trap frame end to hold coon.But,the trap used must be strong springed.The Dukes have a very strong spring--both the longspring and stoploss spring,are very strong.You will find that the stoploss spring puts pressure on a coons foot---this pressure,is directed back at the longspring.
We have a very ,very large coon in Minnesota the Duke stoploss have done a good job in holding them.
We as trappers,will never agree on how we like our traps set up.But I love the Duke Stoploss,because it was built the way I wanted it built.LOL--if there is anything you dont like about the design---you can blame me.
Tom