Swing vote
I believe the folks at MacGregor are probably right, at least with their boats. Personally, I have never locked my keel, although the discussions about possible hull damage from fast retractions in a knockdown have made me more cautious. I now lock the keel in deep water where there is little chance of striking. In lakes with varying depth, gunkholing or nearing shallow water, I keep it unlocked. In my experience, I would disagree with the previous theory. We often hit obstacles on the ponds in Maine with no effect. We often ground in the Chesapeake trying to enter unfamiliar creeks with six feet of keel. I am much more concerned about damage to the locking pin hole, the pivot pin, and its (fglass) hole in a hard strike. The wire pendant is kept slack to minimize 'moan' and is not going to affect the winch.Furthermore, I fear twisting the keel/slot when stuck in mud or sand. With headway killed, the boat usually pivots. By the time you unpin it (under pressure) and crank the winch, the boat may have spun quite a bit.