Ap, understand. In fact I did something like you want originally (and also should be in original mod skinpack). I suggested to Piet not to use awful nationalist Spain black roundels from forgotten countries in this aircaft when this country selected (I think this can be done, it's done also for desert skins and so) but only numbers (also awful, but it's a starting point, also for number types I could provide a better template), so I did "default" skins for every model with just only accurate roundels and without numbers, but finally it wasn't done. Also I thought something like that could be done for Germany in fact, 36 to 39 era black cross were usually in a very different style and location from later ones, so also for German skin could be done getting accurate german crosses without modding directly markings (modding that means different style markings in differente years and I don't know if that can be done, or even have any interest for the people, so doing it directly with a special default skin is easier). But that was only an idea while the mod grew up, later wasn't done.
Will try to remember that and tomorrow will upload the skins you want, it's just five minutes
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Anyway you are right, the better will be leave those aircraft without markings for both sides, black roundels are awful and white tips are missing, but also Republican Spain markings are wrong!! and red bands cannot be represented I think. We said many times, but that was never corrected in forgotten countries mod and you get post-war spanish roundels selecting "Spanish Republic". If you need support convincing people on that call me
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S!