I would send a list of the repairs that you sought, and the reply, to FR and see what they say about it. Call your factory rep as well. When things like this get out to the public, instead of it looking bad on the dealer, it looks bad on Sandpiper even more. I don't care what people pay for a rig, if it has a warranty, they should repair the dang thing! Try another dealer in your area that services FR products and see you if can get satisfaction from them. As you know my friend, document well!
2012 Sandpiper 365SAQ weighing @ 15k, Onan, 2nd air, slide toppers, TST
2013 F350 6.7L Lariat 4x4 CC DRW,Viair 1007, Ride-Rites, Edge CTS, B&W
2001 Chevy 3500CC DRW 4x4, 8.1L, 4.10 gears w/ Detroit TrueTrac
2001 Ford Excursion Limited 4x4 7.3L,V/B Spring Mod, ProComps, Hellwig Swaybar, & other 'Necessities'