500 lbs, not that much? lol to me...I think that's much; flying Spitfires and Corsairs in this game for its entire duration in my life, the Spitfire IX's weight of 7303 lbs. loaded vs. the Spitfire VIII's loaded weight of 7807 lbs. feels like a LOT.
And I have absolutely NO trouble turning a Spit IX tighter. With a whopping 500 lbs less weight on the USMC F4U, that's a good amount of weight lost. The only thing the F4U didn't have much of that I needed was acceleration and 500 lbs weight loss will really help.
I have the USN cross-section of the F4U but if you have the USMC cross section, I could dissect and look, piece by piece, the differences. In published works, this USMC Hog is about as popular as history class is to other kids my age. If there were more/near equal amounts of USMC Hogs compared to USN Hogs, I don't see why we can't have one. Besides, it was the USMC that made those Hogs famous! We'd be able to use those awesome skins of yours, Sax, with confidence.