This is one time once again that it is ok to tell the OP to use the Search Function.
There are at least 500 Threads on making Duds. Just kidding, kinda.
As much fun as it is to make your own device and do them yourself, buy them from
Dawgs Duds.
His are consistent more so than any that you will make. For a few bucks, you can buy a life time supply from him.
Buy ten from him for less than what it will cost you for a few beer and table plugs.
I still play about and make the odd few, but when I put one on or anyone asks for one, chances are great that it will be one of his.
He did promise me that he will leave me his recipe in his Will. Not that I want him to die or anything. Just that I doubt it will ever happen. Not before me anyway.
Dorman, if you made that jig in the pictoore, I will have to say that is one of the bestest Home Made Dud Jigs that I have seen so far.