Welcome to the board Stayincharge!
I’ve never heard of splitting suckers open. You’re using that for channels, I’m guessing? Also with the 3-ways, how long of a lead are you using after the sinker. Sounds interesting.
I normally use suckers for flats..although I’m really trying 4- 5 inch bullheads this year. For channels, my best luck has come from my cut suckers that have expired while using them for flats. So suckers in one way or the other have worked the best…so far.
Since MN descriminates against there own, I’m limited to size as species of fish.