I was involved in restoring a G-Cat 5.5 this summer to present as a wedding present to a friend. One of the things we did was to use 3M 4200 to attach a 10 foot section of 1" by 1/8" aluminum strip to the bottom of the middle portion of each hull to prevent further wear and tear. The additional weight was really minimal. I did this because of my 12 years of excellent experience with the same treatment on the Mystere 4.3s that I raced and I knew it would be used often on beaches. The new owner is busy and not experienced with maintaining boats so this will make it significantly easier for him. It also was relatively easy and inexpensive to do.