I have a set of low poundage SF limbs that I use occasionally coming back from injury (most recently a broken rib but that's not important..........)
Last time that I got them off the shelf I noticed that the top limb had lots of horizontal cracks in them. They could be cracks in the lacquer; they could be something worse. But this is a set of limbs that have seen very little use. Again, it could just be an unlucky set, and it could just be cosmetic, but because of this and other issues that I've had with their kit I'm not impressed with SF quality.