Try using a Rapala sallow diving Husky Jerk off trolling boards. These are good for casting or trolling. This year I have had good luck trolling 3’ and 6’harnesses with meat. I rig the 6’ with 1oz inline weight off trolling boards and the 6’ on Dipsy Divers.
As far as boards are concerned I like small boards my favorite is Church Tackle Walleye Boards. The trip mechanism works well and is adjustable.Good Luck
Thanks Tony NAFC Life Member