Had a little time tonight to tinker... I've come up with what I think is the ideal map space. Juri (or others), any thoughts?
I've got Shumshu, Paramushir, a few other islands plus Kamchatka and Petropavlovsk airfield which I believe was host to most (or all)?) of 128 SAD including the P-63 equipped 888 IAP.
Playing around with the DERM stuff right now trying to get it to spit out a IL-2 resolution file but... having a bit of trouble. Will keep trying.