Hi Steffen,
nice to see your Mig advancing, at last
IMHO you should stop further stenciling and even town down the existing ones (maybe through filtering)! If you look at pics of LSK/LV Mig's you'll barely notice the existance of stenciling, but in a very subtle fashion. (781 and her 'sister' 782 are depicted very nice in W.Kopenhagen's "Die andere deutsche Luftwaffe" pg. 80)
And you're right, after general maintenance in Dresden, the stencils have been reapplid in german language. You may take a look at "Final Touchdown" from Concord. There you'll find a pic of a "black guy" overspraying the national insignia on the fin. One can clearly read "Umlenkhebel Seitenruder" and other german stencils...
Good luck!!!
Volker