I don't know for sure that they beefed up the screws, but my casters are doing well so I imagine they did. I roll them with a cab stacked on top of the other, and no problems in the past couple months. And the latches are a million times better than the originals. They're the same latches they use on the Heritage B-15, and they were approved by Mark Gandenberger from Vintage Blue who was a consultant on the Heritage B-15, and if they're good enough for him, they're good enough for us. Before Ampeg started using these latches, Mark once spent an outrageous amount of money customizing latches for use on his B-15 repro cabs, so he knows what he's talking about.