felton wrote:

Check and see how much bend. Bend is not your friend, as that lexan
(or whatever you use) won't want to stay bent. The bigger or longer
the piece, the bigger the issue. I agree that you see where folks
have drilled and installed exterior screws through the portlight into
the cabin top (slightly larger holes in the lexan to allow for
movement). That just strikes me as a bad design. Lots of holes, but
perhaps unavoidable.

Someone (elsewhere) mentioned that there are splined fixings which fit tight
into the acrylic and pass through the GRP to take nuts on the inside. The
idea is that one can't put a screwdriver or spanner on them from the
outside. So, I would assume that the oversize holes would be in the GRP if
using that type of fixing. That said, it's not the most luxurious of boats
and isn't exactly a thief magnet - and I'm probably going to use locknuts on
the inside, which would make unscrewing very difficult no what type of
fixing was used.


Not if you are selling the boat before the things start leaking in the
future, but otherwise, yes Given time, everyhting needs to be
rebedded periodically, or the portlight material will become crazed,
brittle or otherwise in need of replacement. You don't want to tear
up your cabintop getting them out.

Qiute. I gather butyl tape strikes a good balance between getting a good
seal and being remvable.


--
Wally
www.artbywally.com
www.wally.myby.co.uk/music