Making a curved sight glass idea

[FuelMaker]

Did a site search but haven't found anything on how to go about making a curved sight glass so I thought I'd bounce my idea off the experts here since I don't know much about heat forming glass other than reading a few articles.

The idea is to cut out a rectangle in the Tee that my VM product take off is on (making sure that I don't go more than 45% through the Tee) then take a piece of untempered plate glass and place it in a makeshift firebrick propane furnace on a piece of scrap stainless column.

Then slowly heat the glass up until it relaxes and forms to the curved stainless then slowly reduce the temp to avoid cracking it, then doing an anneal cycle.

I do know that glass isn't nearly as delicate as people think it is, I've made several glass circles for replacement instrument faces by cutting out a square and using a belt sander w/ 320grit zirconia sandpaper to sand it round. It takes forever and glass powder gets everywhere unless you have a shop vac going but it works great.

To hold it to the column I was thinking of cutting out a foamed PTFE gasket and holding it to the column with a pipe clamp with more gasket material between the clamps and the glass.

It wouldn't look very elegant but I think it'd work.

I've been looking for a pre-curved piece I can cut out but I cant find anything exactly matching the OD of my column.