The accordion-type wire loom with a split lengthwise is simpler to install. Just use a couple of wraps of electrician's plastic tape every few inches to keep it closed up. It comes in several diameters and is sold by the foot on Ebay.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!