Thanks for the 'how to' Bob,
I'd been quoted £36 for a new glass which i thought was really good since that also included shipping the dti to and from America but i then saw your post and thought i'd try your method first...It worked a treat....Although it took a few attempts to make a piece without it getting to hot then making tiny bubbles in it..your instructions were excellent....
Thankyou, your cleverness...

...Mike...