Sounds like a complex problem - keep your rigs simple.
Fishfinder - braid through fishfinder sleeve and connected to barrel swivel. Leader from swivel to hook. Braid and mono never connected
Threeway - Braid connected to "top" eye. Leader to hook connected to "middle" eye. Lighter test line or leader material connected to "bottom" eye to attache weight. Braid and mono never connected.
Fishfinder - braid through fishfinder sleeve and connected to barrel swivel. Leader from swivel to hook. Braid and mono never connected
Threeway - Braid connected to "top" eye. Leader to hook connected to "middle" eye. Lighter test line or leader material connected to "bottom" eye to attache weight. Braid and mono never connected.