At 09:37 AM 3/10/2013, you wrote: >Polycarbonate has some really good characteristics and some really bad >ones. It can take a whole lot of energy and not fail...but it can also >break just under static stress when it comes in contact with certain >chemicals.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++ heating Plexiglass and forming it over a mold would relieve it of all static stress in its new shape. Be careful when drilling the mounting holes. It might be better to melt the holes with a small soldering iron. Slightly oversized would be good with the hold down screws not too tight to allow a slight bit of expansion / contraction. Both my flat wrapped lenses have performed well for 500 hours now. Larry Flesner
