We have a 2008 311 RLS. Only major problems were replacing the staples holding up the hanger rails in main wardrobe with angle brackets and substantial screws. Also added 1 x 1 angle iron on bed slide to hold the caster that fell off allowing bed to drag on trailer. Other than that we have had no other issues. Great rig.
Jim :W
2007 Silverado 3/4 LTZ Crew Duramax/Allison
2008 Keystone Cougar 311RLS