In regards to the blistering issue. Early Great Harbours (prior to 2005) had polyester resin standard, with vinylester resin barrier coats as an extra cost option. Obviously, the only boats with blisters would be the polyester boats. As far as I know, only a few were built without the extra-cost vinylester barrier coats. Vicksburg is one of them, of course. All boats built since 2005 (and maybe somewhat earlier - I started with the company in '05) have the vinylester standard. I have never heard of any blistering on these boats. If you contact Mirage about a specific early boat, they can probably check the records and tell you whether it got the vinylester or not.