G'day Tom (@tcinla),
I thought briefly about trying to modify the LE slats, but with three kits to build I didn't want to complicate things too much.
Seeing your results, I might try next time I build an Me 262 (I have a couple of Dragon kits left).
I like your camouflage scheme, too.
I've attached a couple of photos of one of the kit aircraft, White 2 of 1./NAG 1.
These are from the JaPo book, "Messerschmitt Me 262 Production & Arado Ar 234 Final Operations".
The authors state, and I think the photos back them up, that this aircraft was painted a particularly dense version of the two colour scheme that you have painted.
White 25 of III./EJG 2 was painted the 'standard', less dense two colour scribble pattern. (Other known aircraft in this scheme, and covered in the book, were White 26, 27, 29, 30, 33 and 34, also of III/EJG 2.)
White 25 has evidence of prior ownership by 1./NAG 6 (corrected from NAC 1: michaelt) with the dark patch under the 2 covering a previous aircraft number (White 30 has a similar patch).
So, you could conceivably use any single digit white number of similar size to the kit "2" and call it a 1./NAG 1 or 1./NAG 6 aircraft. Who is going to contradict you?
2 attached images. Click to enlarge.