Hi again, well it been a little over a week since I started doing the 15 minute practices. I do a 15 minute practice spread out over three times a day instead of the longer practices I was doing in the past. I warm up slowly (as the first few notes I blow are rather weak & thin) but then become more clear & stronger. Before I messed up my chops I would grap my horn, hit a few notes & go, which now I know was wrong. I have no pain in my lips during any of the three 15 minute practices a day & feel like I could go longer but cut it off. However, I still have that "split tone" sound that some of you described, (a little raspy & slightly not in tune sound) but as time passes I hope it will go away, maybe not?