Cant be fagged checking to see if Ive already posted this , but
Make the sinker the cup ….bolt the lead on the bottom of the pvc cup , and make sure the cup is a nice tight fit in the barrel
Seemless barrel is a must .. also , google “sabbot”
The bait comes out of the barrel at full speed , protected by the cup …so no real stress on it .
Dont waste time with hairspray etc …compressed air kicks arse