I would go with spot lock . I had a minkota on my boat for years pre spot lock . I replaced most parts multipal times over the years .I must agree it did work well when it did and was handy at times but when spot lock came out it was redundant . Biggest problem was the anchor and how to secure it when not in use, also hard on the side of the boat. It also takes up significant area of the bow deck when a trolling motor and graph are installed as well
If he wanted SPOT LOCK I would be asking about Electric anchors !!
Spot lock is only as good as your Trolling Motor,If it doesn’t adapt to the TM then Spot Lock is worthless !!