It is modified from Pat's D plan. I did a 500 sq in wing area profile P-51 plan that showed every version of the 51 that escorted the B-17s in Europe, The C with or without the dorsal fin, Malcomb hood or standard, the D with or without the Dorsal etc. I think you can get a copy from Jim Snelson at Control Line Central. He has the masters of 12 of my warbird profiles. The Dauntless and the T-6 shown in the other Lee Lorio contest thread are two of them.