the 766 is straight galss. I took the measurements form a catalog, went to local hadware store and had it cut
Yep, your right, I didn't know the model of it,, most of the bennetts like the 966 1066 and 956 have curved glass. Then for sure you can get your own cut, and I don't even think it needs to have the corners rounded as it has that special gasket for it to sit in,Kinda like a MS80 pump.
Here is a SHell pump I recently did.. it was a Tok 300.