Man, just when I think I've steered clear of a brand with sidewall cracks. That's the first one I've heard of, but I'm sure it's not the first to happen. Something I noticed a while back when I saw one of the first new style 2014 silverbacks, was they added an expansion joint above one of the slides at a similar position to where that crack is. It wasn't the 3QB4 though. The only expansion joint mine has is under the bedroom slide.
John and Rebecca Dickson
Emma-7 / Little John-5 / Iva-1
Full Timing Again, Rev B
2013 Ford F-350 Lariat CC LB PSD
2015 SOB TT - With OC's Awning Poles (#8)
At least in Heaven, RVs will be perfect, and I won't have to keep fixing them.