put the catch wire into the slots, and hold the spring back with a vice grip. 2 people needed here, or alot of ingenuity with a vice...
where the wire meets the spring is where youll need to wrap it around.
trigger, i use a piece of 1/8" thick x 2.5" long x 5/16' wide
dimensions where to drill hole are on the pice in the pic
above pic says 1" on the left, 1 3/4 on the right of the hole
put a piece of #9 wire through the hole, put the longer side into the trap slot, put the trigger right in the middle of the slot, weld the wire to the pipe...allowing the trigger to move up and down freely
using whatever flat scrap you have around, make a plate for the latch mechanism to attach to. extend it 5/16" or so past the spring when pulled back.
depending on what you make the latch with, you either need to drill a hole, or slot for the trigger latch. I make my latches from 3/16" stainless steel round stock and smash the trigger end flat with a biggum hammer
after the latch is attached, push it back towards the piece that it hooks to, mark it, and slot it with a die grinder
should look as such when set
weld a bottom plate on it (i ise a washer, then weld a stake. long bolts work, so does rebar, threaded rod..whatever.
not all that heavy...i might just grab the fish scale and weigh one. I would say theyre just a couple ounces heavier than a grizz.
spring, thats about the smallest i could readily find, with a decent price. I've heard of guys using springs from coil spring traps, but at 4-5 dollars a pop, kind of defeats the savings by making them yourself once you start buying a bunch of more expensive stuff. the tension on this spring i used as almost identical to a grizz as well. a little ugly, sure...but definitely functional