I think I can give some insight on this guys.
I used to work for EZ2CY for 6 years in the Maryland shop from 1998-2004, when I started working there we were using the OLD glass, which breaks.
We were sent a sample of the NEW acrylic, and we did a test. Took a hammer to it, all it did was give it a little smudge on the glass, then hit it with everything we had in the shop, still no break. Then we took the piece and bent it in half on the floor, and stood on it, I am 200lbs soak and wet, and it started to turn white from the friction, and still did not break.
We called our supplier and ordered 20 sheets of it, and that is all we ever used afterwords. Even called a canvas shop who does all the Ocean Yachts, Post's, Viking's in New Gretna N.J. as a option from the factory, and he was happy to get this call, cause Bill Healey from Viking Yachts was about drop EZ2CY ( stop using it ) because of all the breaks. Well Chris Costa ( from the canvas shop) said please send him a sample ASAP and he took it to Mr Healey and a hammer and gave the hammer to him and " Try to braek this " NADA!!!.
So now this is the glass that all the shops use now, and I belive there is a warrent on the breakage of the glass now, check the website.
But I will still go to bat for EZ2CY and say that it is still the best enclousure that you can put on a boat BAR NONE .
As far as motoryachts go ( aft section ) Hatteras's were the most compatible and easier enclouser to design, with lots of different opening options compared to alot of other aft cabin motoryacts.
Bets advice I can give is call your closest shop, and they will come out and give you a quote on an enclousure.
Good Luck. Let me know how you make out, and if you have anymore questions, feel free to email me,
dangerousdan8675309@yahoo.com.
Thanks Dan