It wasn't me was it?
Anywho, here's a link to a CT review I did, and you can see the hose has a sleeve on it.http://festoolownersgroup.com/festool-tool-reviews/review-of-festool-ct-midi-dust-extractor-(583376)/
I used a 1-1/4" nylon mesh sleeve (expands & contracts so you can slip it on), with shrink wrap on each end. I left about 18" un-sleeved on the working end.
It looks very, very shiny and reflective in the video, but that's mostly the spotlighting. It's supposed to be clear, and you can see the Festool green and black hose through it.
I'll have to dig around to find the place I bought it from, if you're interested. It's flexible, and very slick, so it glides over the rails (end protectors or not). I also ran a 16g plug-it cord through there, so I always have power with the hose.