I have determined that I have several leaks in the deck/hull joint. Mostly forward. Can any of you provide hints as to how to go about tightening the fasteners? I can't even see most of them from the inside, yet they appear to be typical bolt/washer/lock washer/nut arrangement (the ones I can see). How do you access these things to keep the nut (or bolt, depending) from turning while tightening? Have any of you had to deal with this?

Thanks,
Jeff