Yup. Dead stop will tangle you at least half the time. I do drift sometime but I always try and maintain some line angle even with dead baits. You might get away with adding a slight bit of weight and a leader long enough off the ball that your bait sinks below the ball which would minimize but not eliminate the tangles I think.
I'd be careful. 30 lbs line or more wrapped around a downrigger cable and a big fish hits, I imagine it could flip the kayak in a hurry if you weren't ready for it. I have a drag on my downrigger. It allows me to fish right on the bottom and even if it snags I don't come to a dead stop. When I remember, I try to set it where it just stops the ball and then a tad more even when I'm well off the bottom. I've hit kelp, large jelly fish, and other who knows what they were that's made my kayak come to a sudden halt.
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