If anyone is still interested in this topic, my friend Trevor Neumann has played valve bone for awhile. He is a truly excellent trumpet player who can play great lead and classical. He is an Eastman trained player who went there with Chris Martin, then played at UMiami as lead tpt. and sometimes ass't lead to Steve Reid, I think. I think he plays for A Chorus Line on B'way right now with Chudoba on lead. He has been trained by excellent teachers his whole playing life and has never had any poor chop habits, so he just keeps his rings concentric and doesn't seem to have any problems switching.

To trumpetplayer4life, I wouldn't know who played any instrument for Beyonce. I went to her website. It appears she plays the gigs where the primary qualification is looking good...