I agree it helped the action quite a bit Mike.
Most of the hard swimbaits we build tend to over exagerate the swimming action of a fish. As part of my job, I have watched hundreds of fish swimming underwater and mostly all you see move is the tail of the fish, the body remains very steady. As a fish gets larger and closer to the surface, however, the swimming motion becomes more exagerated. The fish in this video is about 7 pounds (roughly 27 inches), if it were 7 inches the swimming motion would be far less pronounced:
I have built a number of hard plastic swimbaits now and each of them had a more sinuous motion with four sections than they did with three. However, the size of each section makes a big differce too.
If you intend to use the bait for bass I think 4 sections is better because many bass fisherman really like to "slow roll" their swimbaits and more sections will peform better at slow speeds. Four sections on the surface looks very realistic. However, for other species such as musky, pike, stripers, etc., I think 3 sections provides some advantage because it is one less joint to worry about and therefore lessens the liklihood of something going wrong when a huge fish grabs the bait and starts spinning on it.
This video clip is my fav swimbait that I have built thus far, it has three sections (two joints) and as you can see, this bait will really dance. At 57 seconds into the video I slow roll the bait.
YouTube - swimbait video by Bikini Bait Company
Jed V.