Greg,
I used what I think is the same or a similar product that you were asking about. It is a braided sleeve. It reminds me of something I used to play with as a kid - I knew them as Chinese Handcuffs. If you push the sleeve together, it expands. If you try to pull it, the diameter decreases and shrinks down. I also used the heat-shrink cuffs at the end. I think it works very well. Keeps the cord and hose organized and protected. On the hose I have connected to my boom arm, I only ran the sleeve up to where the arm starts. I didn't think there was any reason to go farther than that. For what it's worth, I extended the power cord 11 inches/280 mm beyond the end of the hose. That gives you just enough slack to plug things in with the least amount of slack. Of all my Festools, the tool that needs the most slack (distance from vac port to plug-it) is the MFK 700 with the clear dust port mounted below. The tool that needs the least is the ETS 125. There are probably other tools that require more or less, but within my arsenal, those were my parameters. If it will help, I can check my records to find out exactly what products I have and where I purchased them. I know I have different sized sleeves and cuffs for different size hoses, but I'm not exactly sure what they were off-hand.
TC