Why is that there are some out there who post on other sites, (IPMS and LSP come to mind) that the floor of the cockpit of any F-4 model should be raised? Ben Brown, Theirry Laurent, and Dr. Menolaos Skourtopoulous all include this specific action in their webpages and go as far as to suggest the rear bulkhead of the cockpit is vertical, not sloped as molded?

Anybody got an opinion why?