Trolling Motor Question

[Paddler]

I have a 20' Hewescraft with a Mercury 115EFI with the Troll Control tach. I can increase or decrease my RPMs in 10 RPM increments between 550 RPM and 1000 RPM. I can get as slow as 2.4 MPH in this way. I recently have been getting into kokanee fishing and wanted to figure out a way to go slower. I found some info on a walleye forum about using trolling socks, so. bought two 18" socks and a couple of carabiners, and already had a dock line. I rigged the whole thing up so that when I tie the line off to my bow rails, with the line going under the boat, the carabiners are level with the chine. I can now get down to 1.4 MPH. My engine is very quiet at 550 RPM, it burns 0.2-0.3 GPH. The whole setup cost $40, is very light, cheap to run, and doesn't interfere with fishing, steering, etc.

Here are a couple of photos.
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