Hi Dan,
I recommend 1/8" deflection for the idler and front cable, and 3/16" for the rear cable. 1/4 inch is too much slack and will make the fins feel sloppy. If you skip a link the result will be evident -- the misaligned fin will start smacking the hull on a normal stroke. When you pull the Drive, one of the fins will be out of line by about 15 - 20 degrees and will have to be reset. You can't miss it. This happens with the old stainless sprockets if not adequately tensioned, but not with the plastic sprockets (that I'm aware of).
Sometimes when you get in a trough or medium + chop the fins momentarily surface and all resistance briefly vanishes. Could this be what you're talking about?
