After looking at your pictures with great interest (I am one of those that had the bedroom slide hoses replaced three years ago) let me see if I have this correct.
If I had another failure I could replace the existing fittings, right on the coach without replacing the whole line, as long as I had sufficient hose length. All I would need is the new fitting, vice grips, wrench and some method for cutting the hose. Amazing!
What about cleaning out the hose after the procedure? I guess you could disconnect the other end and blow it out with compressed air. Would that be sufficient? Any other tips?
I think I am going down to a hydraulic hose supply house and get me some of these puppies.