If you are gentle, you can get the trim pieces off without damaging them, and then just decide how you want to put them back on. When we took ours off, instead of putting the original trim back on, I cut thing pieces of utility board, and then my wife stained it. To re-install, I used some screws so I could easily take the pieces on and off again.
It's really a poor design that all of the manufacturers use. These systems need to be looked at yearly (maybe more depending on use) to ensure they are still in good shape and nothing has shifted. Why they used a design that did not allow easy access to the motors and adjustments for the wires is beyond me!
Overall, the cable system is ok, I was never thrilled with it but never had an issue in the time we had the Travel Trailer. The biggest thing with that system is to inspect it every once in a while to ensure all the cables are still in proper alignment. If the slide starts acting odd, or you hear odd noises, don't ignore them! The system may just need a slight adjustment which is literally just turning some nuts. If you take care of it early, you will avoid costly repairs. The main thing that seems to happen is the cables breaking. I use to carry a replacement with me just in case. They sell a repair kit that includes everything you need except a crimping tool. If the motor goes out, just use the tool they gave you to manually operate the motor, but if the cable goes out, you don't have many good options unless you have a spare with you.