I did use the wires on the tail thinking that it needed the support. I realize now that they really weren't needed and I would not use them if I was to do this again. I used the Aerofax Minigraph 8 (stock #0208), "Boeing P-26 & Variants" by Peter Bowers, book for location of markings. I bought this book about 25 years ago and I am not sure it is in print anymore. It was distributed by Motorbooks International, located at that time in Osceola Wis. Phone # in 1984 was 715-294-2090.
Curt