I have some of the original hoppers from back when they started releasing these, and never had any problems. I just picked up the new Union Pacific covered hopper the other day off of the shelf and it has the same probably as Banjoflyer's from above. I picked up my order of 6 more hoppers this morning, but have not un boxed them yet. I don't see it as a big deal, IMO always fixable!! Menard's keep em' coming!
Jeff