Very interesting, I like it.
Your prototypes all provide enough material to firmly attach a hook.
They also have different type twin tails that supply lively action of varying amounts.
Just had a thought, how easy would it be to make a much larger flat or angled head?
A larger head (2x) that is flat or angled on the front would push alot more water and cause a turbulence that would in turn cause the tail to have a crazy action!