Surprised you have not jumped on your P63 wagon with the reasons the M was added.
Don't get me wrong, I want the P-63, big time, but I'm happy with the Jug, and plus, HTC would have to remodel the P-39 to make it a P-63(New wing, and tail sections, not to mention 4 bladed prop, 58 rounds of 37 instead of the standard 30, and up the performance...etc) And I'm not saying don't add the 38H, just, how does it compare to the other 38s?