here's my change story. after 2 years with a dangler I decided to change it for a mic-key. They had me come to the GI clinic for a regular office visit and the doctor said they would just yank it out. She told me it would feel like being snapped with a big rubber band.
So she was guiding her student (a GI fellow) through it, and apparently it was to be his first time (because that's always what you want). He yanked and it hurt pretty bad but was over really fast. Only, when he was done, he was left holding broken length of tube, no internal bumper. Apparently when he yanked, my tube just broke off, leaving the big internal bumper and an inch or two of tube inside my stomach. So then I had to go to the OR for them to retrieve it endoscopically. So what should havee been a 10 minute office visit procedure turned into all day at the hospital!
The doctor told me that can happen with tubes older than 6 months because stomach acid turns them brittle. Im really happy with the mic-key, and since it's a balloon, changing it is easy and painless.