Sure hope they improve the 51B model at some point. Tough to make a Mustang look ugly but the shapes are nowhere near where the 109s are for example.
As for colors. Somehow the antiglare panel doesn't look OD to me. I know you said it's a temp, but on the off chance. The nose bands are backwards for the 339th. Should be white-red-white.
Black wing and tail ID bands would help it too I think.
Just an opinion of course. I've not figured out the skinning stuff yet so I'll not complain about anyone else who has the patience for it
Profile of a D model from the 339th. I'd love to see a Malcom hooded P51B/C in 339th markings at some point. There's one called "Brother Bill" from the 504th FS, 339th that would be a good one as it had both the regular hood and full invasion stripes, and hung around long enough to get the Malcom and D-Day stripes removed later.
Dan/Slack