Requires extra materials
Made and tailored for my dad but he wanted me to share it. Took some of his lures and chose to model it off a bluegill. It sinks and I added bb cavity.

He said it works and has caught some fish on it. Added BB's 1 or 2 tiny ones make a lot of noise for the size.

Update: Played around and discovered if I added a hole between the eyes the fish dive a bit deeper and wiggle more before going back up. Added picture.

Materials
Glue - I use weldon 4, superglue will work too
Steel Rod cutter, dremel ,etc
Steel Rod 1/8 diameter, M3 20mm zinc screw and lob off the head
Screw eyes #216 I use the top picture for the V joint. It allows a lot of flip flop action

Epoxy, acetone, and patience. I use 5 min epoxy. Epoxy the head in the morning and tail in the evening. And put my brush in nail polish remover to save my brush.

I paint all parts separately, glue the head together, add all the screws -- epoxy. Assemble with the tail then epoxy the tail.

Assembly
Head - Do not glue eye screws yet
1.Glue it together
2.Add the eye screws inside the V. Twist it in until the thread doesn't show anymore. Make sure its horizontal. Don't glue eye screws, don't be me do it right the first time

Tail

1. Cut the steel rod to fit the groove.
2. Take the head, the eye screws will need to be horizontal. Put the steel rod through the screws then add/slide the bottom half of the tail it will fit in place. Make sure the screw relief of the tail is towards you, I've ruined a couple from this
3. Add the other tail. Before you glue, make sure it flip flops. Should move easily and make a clickclick sound. If it doesn't move easily loosen the screws.
4. Feel free to glue the screws now