Knightiac

I mainly fish mono and I let the plastic fall on a slack line... If you see it move or feel like it stopped too soon, set the hook. It's free. Worst case you set the hook on nothing. Then when it hits the bottom I like to keep the line fairly tight, just provides better feel. I used to fish jigs on mono until I purchased a separate jig rod (now use floro on that rod). You can still feel most bottom contact bites with mono, if you keep the line fairly tight. You always want to let your lure fall on a slack line so it falls straight down, any tension at all and it will swing back towards you slightly.