Re: Hey Cuber,Did you take your name from Ronald Cuber?
Oh, didnt realize youve been playing that long. I assumed you had just started about the time of your first post. My bad. Anyway, nix the otto link, unless you want an upgrade over your goldentone. Actually, the "vintage" series is probably a better mouthpiece, now that I think about it. But to get closer to the sound that the guy you said you liked, Id try Jody Jazz mouthpieces (their website has accurate discriptions, and you can talk to someone, advising you which one to try) or a Dukoff mouthpiece.
There are a couple places that let you try mouthpieces, and send them back if you dont like them, such as Woodwind Braswind or Musicians friend. Im not sure if they ship internationally, or if there is something more convenient in Europe.
Baffle/tip opening-wise, I would just go with something close to what youre used to, unless its really closed. Especially with vintage horns, having a tip opening too small can muffle the horn a bit, and too large makes the sound kinda spread. But it really depends on you.
Lessons are good. Though you have to be careful at music stores. Some have good people giving lessons, some have an "expert" who actually plays guitar, or something along those lines.