Posted by Doug Elliott on March 07, 2002 at 10:30:38:
In Reply to: Update on Throat Enlargement to 23/64 posted by CK on March 06, 2002 at 23:39:45:
I'm just realizing this is you, Charlie. Yes, I make a Conn Helleberg rim copy, my 4N-130 that is flat on top like most (but not all) Conn Hellebergs. That shape is also available in 4N-128 and 4N-132 sizes. The Helleberg is close in depth to my R cup.