I sent an email to Forest River posing the question about casters on my trailer. They responded with this:
I cannot advise welding anything to the frame, this will void out any warranty you have on the frame. We do sell a riser kit that could possibly take care of this issue for you I would recommend finding a local forest river dealership to inquire on getting this added to your unit.
So, for me anyway, casters are out. Thanks TURBS and B and B for the good advice, I hope you don't mind that I verified it with FR. The Dexter Lift Kit is my next alternative I guess, just not sure it'll give me enough clearance being a 2 5/8" lift.
Jack and Jan
Nights camped 2014 - 8 | Nights camped 2015 - 23 | Nights camped 2016 - 24
2015 Ford Super Duty F350 > Blue Ox Swaypro WD Hitch > 2015 Rockwood Windjammer 3008W