This might ease your mind since the 1st SF birds with 5E seem to be a focus. Note the serial number is lower than the one you are skinning, so it's an earlier D-5. Also note the fuselage stripes.(Image removed from quote.)
A later 5E coded 51 with 1st SF. Lower stripes again.(Image removed from quote.)
Checking the serial number range it appears the change from the stripes halfway up to the style on Bloody Rebel! was in the 700 range about midway through. Even 357th birds that had painted upper surfaces show the later style once it passes that serial range. After that, regardless of which group you look at, the replacement 51s are coming with that style of fuselage striping.
always been on of my favorite skins!