Posted by ken k on November 09, 2002 at 22:39:13:
In Reply to: Replacing metal guides with plastic posted by Bill on November 09, 2002 at 07:34:55:
I too had the guides on my Boosey changed to plastic. These were screwed in. However the repairman had to retap new holes in the valve. I believe the thread is a bit heavier on the plastic guide for obvioous reasons.