I think there's a lack of refinement in the paintwork here and that it requires further improvement. A good indicator of this is the killstripes on your helmet; they're too thick. I don't know exactly what the 501st requirement list state because the 501st doesn't interest me but I do believe their objectives are designed to encourage people toward costumes with a relatively high degree of replication of the movie costumes. Using your killstripes as the easiest to illustrate example: do they replicate the stripes on the Jedi helmet? I would say that they're a way off and that more effort is needed.