tjm127 -- most people have their own idea of where the mpc should be placed -- you will get a lot of answers. I use mostly upper lip (1/3 of it anyhow, 2/3 bottom lip) and the lower lip is just support. NOTE: I have an Asymmetric mpc which has a huge bottom rim, and I am old (45) so it supports my bottom lip well and allows the top to vibrate. YOU - are going to have to decide what it is you want to play and at what level -- I changed my embouchure several times (once because I played to the side, the next because I played low like you) ---- and each time it was a frustrating YEAR to change, but it was always worth it in range, and sound quality. WOW! - you cheated by getting frustrated -- and adjusted your embouchure --- I mean, I told you so in a post before. ---- I am not saying that to be rude, but rather this is how we learn, by listening to others -- your instructor probably can "see" more than us on the net, so you are going to have to listen to him, and determine for yourself what works. BUT MOST EVERYONE -- even on the net where we can't see you had similiar advice --- to rest!!!!! I think you will be alright -- I think even if you decide to stay with the embouchure ---- "you can manage it", or you can change it, and the end result will be -- YOU ARE A TRUMPET PLAYER - so adapt, play, have fun, and share the good times as well as the frustrating times to help others -- what could be better?????