Rowuk just turned up and will say that a lead embouchure does not start with TCE or even embouchure. Lead playing starts with an attitude and not a question. You just failed the first test. So, assuming that you get the attitude, you have a chops question and think that 6 months is enough. HeHe, I think you just failed the second test. It IS theoretically possible to change embouchures in a short time, I have NEVER experienced that in my over 40 years of playing (I haven't worked with every player on the planet though). Now is the question if an embouchure change will be of any benefit? I can't answer that question. Full time lead playing is a pretty special situation. When I was in the Army, I played lead in the dance band, after that I got jobs playing lead with several different types of groups, but not full time. I never needed TCE to do the job even gigs from 8 to 3 in the morning. Based on what you wrote (4 ledger G - 5 minutes - I won't even get into if I believe this or not), I think that your problem is probably too much pressure on the upper lip. That causes your range to stop at a specific note, and limits endurance. Why do we use pressure, because it works - at least for a while. We use it because our breathing and body use suck - if we were doing the job, our range would not "stop" at a specific note, it would just get thinner above a certain couple of notes. This means, before you start working on a new embouchure, it would make sense to straighten out the rest first. Strike 3. My recommendations: NEVER give up your dreams - even if some old ass that seems to know what he is talking about was perhaps a bit too blunt but honest. ALWAYS take measure of where you are now before figuring out where you want to go. After you know your present situation and what is next, you have a shortlist of things to work on. If you are honest, range is probably the least of your concerns. Screaming high notes beyond high C need superior body use and breathing above all else. Only the kiddies focus on the lips. You need to get a good local teacher that plays lead. There are only a small handful of players here at TM that should talk about lead playing. Their posts are immediately recognizable as they offer no embouchure tips. My body is wasted after a long big band gig - my face is not. Get your priorities straight, and you will probably be fine. If there is a grain of truth to your high G, your body and breathing could solve everything with no change to the face. Yes, with TCE a loud double C is possible to those that get along with that concept.