You should be ok at 1.5 for harnesses the warmer the water get the faster you can run em. Last year we were dragging spoons at 1.7-2.0 and the walleye wouldn't leave them alone! Another thing you can try is troll into the wind until you get bigger bags but I would say get two of the biggest bags you can. Im not sure how you are runnin them and I don't wanna insult your intelligence but you are supposed to hook them to the front cleat and run the bags about half way down the boat. And run two so it tracks straight otherwise you wil just fight it. My. Buddy dream catcher runs two 45 inch bags on his 27 foot sportcraft and he can get down to 1.3 and it's got a 350 in it. Hope this helps