I just cleaned up the old fittings and it looked like window putty was used to seal the glass. The sight glass got broken in shipment so I never tried to run the engine. I have had one blow on me and it was kinda scary to say the least.
I broke the first glass 1/2 way through the second bend. I'm leaving the glass long but may try Jurgen's approach of cutting to length first, if I can't get a clean cut after bending. I'm glad I have a lot of glass
