I'll second staying away from the megatones for a while, if not a few years or more.... I got a new megatone earlier this summer, after nearly ten years of playing a standard 3C (granted I didn't play the same mp size all those years), I moved to a 3C Megatone, and I could barely play the horn - it was SO hard I almost took it back and got my money back (something around $50, I believe), that and I made the mistake of also adding the weighted trim kit, so I couldn't blow through it at all - avoid that for a while too. One of my peers here at the college also tried a megatone and hated it because he couldn't get it to sound. He's the same age as me, so I suspect he's been playing the same amount of time. I personally view the megatones as a crutch to keep you from focusing on getting a better sound, though it will take from your endurance and range since your lips have to work harder with the added mass - moving back to the regular size will increase both to what they would be otherwise; so maybe tool is a better word than crutch. A few days of sticking to it though, and switching back and forth from the standard to the mega I got used to it, and now I love it. But yeah, if you're already having troubles, avoiding anything that'll make it harder on you.