Re: Julius Keilwerth Sax Problem?
If the resonator is hitting the edge of the tonehole, then that absolutely would be an issue as the pad won't seal all the way. If it's simply off-center but not hitting the tonehole, then that is not the source of your troubles.
I address pad leaks by detaching the spring and evaluating how good the seal is with only gravity pulling the pad down onto the tonehole - no finger pressure. You should not have to mash the keys down to get a good seal.
If you're able to diagnose what you think the problem is, then a tech might only charge $5 to $25 (depending on what kind of mood they are in) to address the problem. If you simply hand the horn across the counter and say "I dunno. It's broke - fix it", they may charge as much as $50 or so to do an overall adjustment. This is not a bad idea, actually, unless money is of great concern. They may be able to fine tune things - addressing other problems you may not be aware of. It could feel like a totally new horn to you when they're done with it.
I think it's a great idea for every saxophone player to be able to go over their horn to manage their own minor adjustments, but it's just not for everyone. I just think it's fun.
That's why I asked if you were mechanically inclined. If you are, then I'd nudge you to fiddle with it on your own. If you're not, just fork over the cash to your tech because the mechanics are far from simple.