I have made a few skull jigheads over the years but this time i thought and jazz things up with a willow underspin blade. Not sure if the fish will appreciate the effort or the creepy design, but who cares it looks like the kind of evil that will catch something.
The mold was designed in cad (fusion360) using a free skull scan from thingiverse an online design file host for 3d printing, It was then heavily modified to to make it solid and add the hardware like hooks and keeps and eye for the underspin. I then 3d resin printed a two part master i could pour heat resistant silicone into to give me the mold.
Tools, materials
Software Fusion 360 still free to makers and hobbyists
https://www.autodesk.co.uk/Citubox slicing software again free
https://www.chitubox.com/Elegoo mars 2 pro resin 3d printer
https://www.elegoo.com/elegoo abs like transparent resin Amazon link
https://amzn.to/3M3o97eElegoo curing station
Isopropyl alcohol for rein cleanup
heat resistant rtv silicone HT3120 Amazon link
https://amzn.to/42c87xhsome pins to mold alignment
5/0 90deg bend jig hook Amazon link
https://amzn.to/3AZg5xSsmaller jig hook trimmed to make hanger for the blade
1mm s/steel wire for the keeper
Lead free pewter for casing melted in a kitchen measuring cup on electric ring
spit rings
willow blade
ball bearing swivel