I spoke with Lippert and FR today. Lippert claims they do not supply the hydraulic lines to FR. The hoses come from another supplier. Mike Burns at FR didn't know who the supplier was, but had heard of this blistering problem before. He suggested I schedule an appointment with my dealer (I already have) and have them contact the dealer rep (John Armstrong). I'll post an update after I've seen the dealer.
Also, according to Lippert, in the event of a hose failure and loss of pressure, there would nothing to prevent the slide rooms from moving while driving. I went to Walmart and bought some adjustable shower curtain rods to use as braces while the coach is moving, just in case. If there is a failure with the slide rooms out, they said you should be able to push them in by hand ( may need a 2nd person). They claimed the jacks should retract with loss of hydraulics.
Rod & Carla B.
The Hounds Kooper & Abby
2015 Sunseeker 3010; '14 Ford Focus toad