I need help...I have a 91' Cheyenne Skier that leaks like the titanic. I have repacked the shaft, but I get a ton of water from my tracking fins. Here is the question. Can I remove the fins, and replace the silicone and expect that to work? The flex in the hull seems to loosen the bolts and they all seem to continually leak? I am afraid to tighten them too much because I fear it will crack the hull? Any information would be of help. Thanks...