I wish I could tell you, but I haven't yet had a chance to put any of what I've been learning from others about Columbia Kwikfish to the test for myself.

I have heard every recommendation from 1 Siwash off either eye, to 2 trebles. My experience with digging trebles out of a fish's mouth is enough to make me steer clear of them in any circumstance, especially when I have kids on the boat that want to "help". As for the single off the tail vs. the single off the belly, my hunch is that the single off the tail ends up waving around so far back from the strike zone that it is possible to swing around and get the fish in the eye or the gill. 25% of the Columbia springers are ESA-listed nates. That's another reason I can't in good conscience keep the trebles on there.

I personally am going to run 2 singles Gami 510's. They will be on barrels running off of a split ring off each eye. 50" of 50# mono is then tied directly to the front eye.

Here is that second picture. Note how a single or treble off the belly eye can be placed so it ends up almost back at the tail: