Well, I took my second prototype with the sliding cylindrical ballast out for a swim in 10-15 mph winds. It swam really well, and down to 6'+, judging by the weeds I caught casting off my dock. But, although I was able to tune the line tie to get it to swim straight, I don't know if it really hunted. When I held my rod up and swam it close to the surface, it looked like it might hunt a little, but I couldn't tell for sure.
I'm making prototype #3 with a shorter ballast piece, to get more lateral shift within the lure. I hope having it 3/8" long in a 3/4" bore hole will make uneven ballasting more noticeable.
If #3 doesn't hunt, I plan to make Prototype #4 with a longer lip that I can slowly shorten, to see if I can get Dave's method to work.
Note to self: It is hard to see how a lure swims when the water is muddy. Doh!!!