Getting rid of the gurgle certainly can be got around by playing technique. I have a gurgle of the sort described - But if I take in a little more mouthpiece and blow slightly harder (and louder), it stops. I've been playing on and off for around 40 years, and used to play around with some really beaten-up old wrecks in a repairer friend's workshop - I learned how to make most of them sound reasonable by blowing techniques, and many of them were riddled with leaks. We had a laugh one day with a teacher who happened to be there - She tried out a beaten-up old sax and couldn't get a note out of it, and declared that it needed a complete repadding and setting up - I had played this particular sax before, and took it off her and did a pretty good rendition of "Someday my Prince Will Come" - She was rendered pretty well speechless by that. I also used to play equally crap saxes on gigs on occasion, which I'd borrowed from my friend, so it's possibly to play over the "cracks" to a great extent when you've played lots of different saxes over a period of years, and especially when a lot of them were bashed-up wrecks. Trouble is, it makes to have to work harder, when perhaps you would like to enjoy playing and relax a bit.
By the way, talking of putting things down the bell - Has anyone heard of gluing a piece of string down a clarinet to put a HP instrument into LP ?
I haven't tried this wrinkle but it came to me from an old pro.
Richard