A few years back at our local launch ramp, a fellow was having a tough time getting his boat off the trailer. I offered my help thinking he forgot the transom straps. He assured me they were off so after much backing down and slamming on the brakes while his wife and I pulled, yanked for all we were worth, it finally came off with all kinds of nasty sounds....I noticed the bunk boards were kinda chewed up in a couple spots. After a short conversation with the owner about his recent remodel on his interior, I realized he screwed thru the hull into his bunk boards on the trailer !!!
The best part of this story happened a few weeks later.....he showed up at the ramp again, proudly telling me he fixed his boat....he did, I guess.....he cut off the excess screw length and covered them over with some sort of filler covering the holes, he was here to see if it leaked !!