sight glasses

[sabu386]

I was on this sight about 8 or 10 years ago and found it very helpful. Made a turkey fryer still with a wet cooling coil and a 1/4 beer keg with 2 inch copper and a shotgun condenser. The beer keg stuff was modular to be able to move it to a 15 gal beer keg I owned but had not set up yet. I built a flute from 4 inch copper with 6 preferated plates. Built the shotgun defrageameter with lots of pipes by mistake but i guess there cannot be too much cooling. Now the important part. I used copper triclamp ferrels for the sight glasses and bought pyrex glass made to fit sight glasses that attached with multiple socket head screws to another type of sight glass. I had intended to use 2 inch triclamps with the included silicone o-rings. Internet was full of this method at the time. Now I can not find any reference to this on the internet at all. Went back to some old still dragon literature and pics of this method are there so I did not imagine it. Why did this method disappear. Is it dangerous. Is another method better and safer. Tell me what you think or even better what you know. I have a lot of very nice copper work and I really do not want to de solder and resolder different sight glasses but it can be done if it has to be done. Thanks for your time.