I'm 27, and I really like the sitting, but then again, I might be getting old for my time.
You may want to replace the rubber tip with one for canes you can get at any drugstore. I have one, and I have no problem with my bass sliding. Plus, I have one of those strap stoppers (whatever you call them) that are made for a cello for added stopping power. Then again, a cane tip may again make you think you're getting old.
Nick