Doing this from my phone so can't read all the other responses but I primarily jig and here are the problems with the heads I use (I use mike burgesses and I really like them but improvements can be made)
1) shank on hook and hook in general pretty much too small. Gets lost in a 10" bkd
2) can't use them on smaller baits or they tear the plastic (above 1 oz ers)
3) eyes fall off so not real necessary

he uses a great sharp hook though. I'd be interested in whatever you can make especially if these improvements are Inc.
Mark