Like those jigs Buddy.
I did some work with JSC (James Canaday) a long while back with some jigs that he poured using modified Paul Ament molds. I was having problems with tracking using chin style spins. Too much vibration maybe.. The belly style spins seems to help the UL jigs stabilize - like a tail on a kite. I'm trolling between .6 & .8 - these BS jigs start turning almost right away.