Glad to hear you're doing better Chris.
Rick, I'm sure you have your reasons but, there's always a but, I don't believe anyone can say for certain what the exact colors were for "Red 13". I also did some research and It could have been RLM 82/83 or RLM 82/81. However, color photos of aircraft later in this "Werknummer" block distinctly show 75/74. Example "White 17" W. Nf. 110956. shown in Stormbird Colors; Construction, Camouflage and markings of the Me 262. It makes sense to me that "Red 13" would be painted the same. Also, regarded Luftwaffe experts Jerry Crandell, Ben Evans, and Brett Green all three suggest RLM 75/74. And thats good enough for me. Tamiya's recommendation ( usually with a grain of salt) also suggests RLM 75/74.
So ...that's what I chose and I'm certainly not going to change it now. Besides, I kinda like the purple color. LOL!
Cheers,
Jerry