I'll have to take a pic of Chronos' cage when I get home...mostly, he has corner hammocks about every 10 inches around his cage in a sort of circular pattern going top to bottom, because he's missing most of his toes (he has only 1 front hand intact), and he falls a lot-the first night we had him we didn't realize they were all missing, and kept trying to figure out what the CRASH every 15-20 minutes was
-it was Chronos hitting the bottom of the cage.
The danger with an ecollar is similar-you want to prevent a hard fall, especially since in the collar they may not be able to reach out and catch themselves-it gets in the way. I kept Riker's food/drink dishes under hammocks his collar could clear-about 4" off the floor. When he'd climb above that, they'd catch him if he fell and prevent a hard landing. Mostly, except for feeding with the trough feeders for one in a collar, and sleeping arrangements in something that will also accomodate the collar, I haven't had to use anything else, even for one with severe HLP-although ramps can be useful as well IF the glider uses them-you don't want them to fall on one. I've thought about fleece ones that can be tied to the cage instead...then if they were to fall on it, wouldn't get hurt, but could also walk/climb up and down them-haven't tried that yet though, and might not be easy for a collar to maneuver, but without one it's an idea.