Wow... such harsh comments.
Let me clarify my statement. In regards to the Mossie's head positions, the Ju88s, planes like the 110s, and so forth where you can clearly move the head position way out of normal, either up/down/left/right/front or back, it's unlimited within the scope of the canopy (and sometimes outside of it -- don't ask).
In regards to that, many early AH models have unrealistic view constraints. I was guessing (only guessing) that one possible explanation for the views being limited in the new planes was that HTC was deciding to take a stand and limit these. I don't know that the F6F is incorrect, nor do I know that HTC's idea is correct. I'm just supposing they're taking a new stance with the standards they model.
As for the specs on these new standards -- that's something to take up with HTC.