Full D-Day stripes were used until early to mid July. Then it was half stripes on fuselage and under wings. In September/October the wing stripes were supposed to come off the bottom of the wings. This DID NOT always happen as I've seen numerous photos of 9th AF 38s with underwing D-Day stripes still on during the winter of 44/45.
Fuselage stripes were supposed to come off in January 45 or so.
Using a current warbird for any historical reference is always a roll of the dice. I wouldn't use them as a reference unless I had matching historical photos to go with it.
I'd also want to see both those 443 Squadron Spits in historical photos to confirm they had E wings when they were flying on D-Day cause I'm not positive the E wing birds were in action yet.
ML407 was rebuilt by Supermarine as a 2 seat trainer post war and then restored back to single seat so it's more then likely that it had the wings replaced. The two seat trainers had no cannon, just the two outboard MGs.
I've seen photos of the unrestored MK356 with Universal wings and a small tail as well, so it's entirely possible it got new E wings and the broad chord rudder during it's restoration to flight.
I guess my point being if I was going to skin that one, I'd be much more apt to do it on the AH IX model with the small tail and universal wing as that's what the majority of the D-Day Spits were set up as, as least from the photos taken of Spits at the time.