Bob from Milwaukee.
Your TV picture on your posting is great11... post it as a picture jpg.
So I can save in as a screen saver!

Bagadow

I probably dosent mater. First place is in order to properly cure vacseal, you need to cure it with heat, or it will take forever to set up. Probably on the order of months. Heating your tube may be higher risk than leaving it alone and hoping for the best.

I take the attituce, If it aint broke don't fix it.

[QUOTE=bgadow;2957791]Maybe the sharpest picture I have is on a rectangular Admiral with metal tube. Could there be something to that, having better focus with a metal funnel?

The metal tubes use a precision glass faceplate, which has uniform thickness, and is quite thin. That's the major difference.