Quoted from Pin-it:
Go to Pin repair section 3 m and Clay discusses taking three rounds of wire off the pop coils to add more power.
Be careful though. Less wire = less resistance = more amps = burned coils
Depending on how you look at it, you might be better off buying the coil from PBR.
If you put the pbr coil in, you probably have a better chance at it working right than just winging it as to how many wraps you pull off. Even then, you are left with an ugly coil that you would have to re-wrap, or have it just looked hosed up.
OTOH, if you screw it up, the worst you end up with is having to but a coil, which is what you might end up doing anyway, so why not?
Just depends, are you buying or selling. Me? I would clean up the mechanicals of the pop bumper, if I still didn't like it, I would high tap it. I have never been unhappy with the results of that course of action.