if the anti chaf spring doesnt fit, why use it?
Cedar plugs dont run on handlines for squat, handlines are to close to the boat and the plugs wander all over, you will probably tangle a mess with them on a handline. So that leaves running cedar plugs on rods. Just how heavy of line do you think you need for a cedar plug? If the crimp is to big for the line your using, use a smaller line. 40 or 50 lb mono is plenty, you could even get by with less. The smaller the line, the smaller the crimp.
I dont have any store bought plugs and dont know how big the hole is, but my homemade ones have a 1/4 inch hole and I have no problem with a low profile knot to the hook and 120lb line, no crimp.