I have a whole set of asymmetrics by Lynch. I have two lead models that I've had adapted for receiving Warburton backbores. I use one of those on my Shiclke P5-4A picc. I used to use the other one for lead work with a big Schmidt backbore. However, since I got my GSC model Chicago Brassworks trumpet, I just use a stock lead model for most of my commercial work.
I also had an Opera model fitted with a Warburton cornet backbore for use in cornet. I even use that one, on occasion, with a little duct tape around the shank on flugelhorn.
I personally prefer the model 3C on my C trumpet, though, if the gig is pretty sedate or needs to be very softly played, I use the Opera model.
I tried to make an asymmetric for my bass trumpet and trombone, but I had mixed results from my model.
I still play conventionals, but rather rarely these days. I have become quite comfortable with the asymmetrics and, for me, the results have been too good to look back.
Now, I've got to go and read the whole thread! I'm not sure I'm even answering a question at all!
Gotta run!
Peace.
http://www.ampcast.com/NickDrozdoff http://www.mp3unsigned.com/NickDrozdoff.ASP http://nickdrozdoff.blogspot.com