OK let's try this one more time. Let me preface by saying this is not a fix for boats that are to be raced. This is what I did to fix the delam problem with Hobies. Both of my hulls had soft tops which I fixed with git rot, worked fine until somebody decided to sit on the hull. Needless to say the git rot cracked and I was right back to where I started. I sail strictly in the ocean and my boat takes a beating. This fix has lasted for the past 3 years and is still good today. I used marine polyurathane closed cell foam, 4 lb. Comes in gallons. I cut access plates in front of the foward pylons, tilted the boat at a 45, mixed a gallon of the resin and a gallon of the hardener and poured thru the access hole. Foam fill from the tip back to the pylon pressing the layers of glass and foam snugly together. Now my tops are rock hard, you can jump on them and they will not budge, no deformaty to the hull shape and it added 16 lbs to each hull. You can probably use 2 lb foam but no need to go to 6 or 8 lb foam, to hard. The foam does not absorb water. Like I said I did this 3 years ago and the tops are still rock hard with no water intrusion. You cannot pour foam between the layers of glass, it will blow the layers apart.