I’ve not built one of Paul’s benches, but I think he has published several versions over the years. It might help others to answer if you could post a link to the version that you built to help us know exactly which one. Also, have you tried all of the things suggested in Paul’s blog where you asked for help? He mentioned the importance of gluing the aprons, but it sounded like you didn’t do that. On this bench, is the well board glued in? Could you remove it? I’m wondering if pounding it in distorted and loosened some of the joinery, so I’d like to know if it can be removed and then if you can examine the bench.