I read somewhere that WWF's magazine in 1984 did a feature on the David Von Erich memorial show. Plus, Kerry (and I think Kevin) did a couple of MSG show's in the early 80's according to the Cawthon site. I'm sure the reason Vince called them a great family was because Fritz never made any serious attempts at going head to head with him in the 80's when World Class was hot and ripe to become a bigger company and threat to the WWF.