I'm guessing in some cases, Forest River might not make a recommendation for some upgrades or modifications due to possible liability.
I'm sure they do not "officially" approve of my spring over axle modification; nor would they or AL-KO "officially" approve of my upgrade from the 10 x 1 3/4" brakes to the more standard 10 x 2 1/4" inch brakes.
But all those parts are now off warranty; if there ever was on, so the upgrades and mods will continue.
Trailer: Lifted 228BH, heavy duty springs and Yokohama tires
TV: 2016 GMC Sierra Z71 4x4 CC, SLT
Spare TV: Two Alaskan Malamutes
Living somewhere in ID; previously lived in Moab UT; previous to that, don't ask!