Like this idea.
I would be content with renaming the P-47D-11 to the P-47D-15 if only to keep the number of total plane variants down.
If the D-11 had these options, it would be pretty good. (Wiki)
200 U.S. gallon (758 l) ferry tank: A conformal tub-shaped jettisonable tank made of paper, which barely cleared the ground on grass airfields, was used as an interim measure between 30 July and 31 August 1943.
75 U.S. gallon(284 l) drop tank: A standardized, all-metal teardrop-shaped steel tank with a prominent protruding horizontal seam, initially produced for the P-39 Airacobra, was adapted to the P-47 beginning 31 August 1943. It was initially carried on the belly shackle, but was used in pairs in 1944 as underwing tanks, and adopted as a standard accessory in the US inventory.
108 U.S. gallon (409 l) drop tank: A cylindrical paper tank of British design and manufacture, used as a belly tank beginning in September 1943 and a wing tank in April 1944.
150 U.S. gallon (568 l) drop tank: A steel tank first used as a belly tank 20 February 1944, and an underwing tank 22 May 1944.
215 U.S. gallon (810 l) drop tank: A wide, flat steel tank developed by VIII Service Command was first used in February 1945.
165 U.S. gallon (625 l) drop tank: This tank, produced by Lockheed, could be used either as a fuel tank or as a napalm container.
110 U.S. gallon (416 l) drop tank: This tank was similar in shape to the 75 gallon drop tank, but was larger. It could also be used as a napalm container.
