I understand and it would be cool to have a custom made die to fool around with.
My biggest concern like I said in that thread, was that if the Forster does not size the case body then by the 3rd or 4th firing you are going to have a sticky bolt lift anyway. I have a tight chambered 280AI from Hart and the Redding Body Die does not size the case body (die too big / fired case too small). I get a sticky bolt lift by the 4th reloading. Eventually I will have to do something but right now I am on the second loading of 50 cases and working on other things, so it can wait. The case binds a little at the pressure ring when chambering and extracting. Annoying but workable.
The 308 is a low body taper kind of case anyway, and it would be prone to case body binding like the WSM's and my 280AI.
You'll figure it out but not exactly a glowing first report on the Forster. I'll wait a while