A bit of a summary, mostly for my own later reference, but some of the projects I am toying with for Check Your 6!
Spanish Civil War - I have a few Heinkel He.51s, Bf.109s, and now with my friend's collection, some Cr.32s. I need some more bad guys to go against them. I do have four I-16s painted up, but in Soviet markings.
German-Czech What If - Just got my order for eight Avia B.534s from MSD, and I plan on buying some early mark Bf.109s to go against them, but I still need to find a few period German bombers to add in. Most of the German bombers on the market that were round in 1938 are later period versions, and so a bit incorrect.
Romanian-Soviet Front - I like the Heinkel He.112, a lot. While there were only a few made (less than 100) it is still a cool looking bird. There is a neat encounter in June, 1941 in which Romanian He.112s are strafing a Soviet airfield while the I-16s based on the field are taking off. Turns into a hairball of a fight, with a dozen Heinkels facing upwards of thirty Ratas. Rating the He.112 is a bit of a bear, seemingly a tad slower than the Bf.109B, less agile, but more maneuverable, I think I would rate the 112 as follows: A4+1, with a robustness of 1, and armed with FF: 2xLVC, 2xLMG. This would make them a tad better than the I-16, with a better punch for armament, which should help a bit with the number disparity. I already have four I-16s painted in Soviet colors, but would need to order some Heinkels from MSD along with a slew more of the Ratas.
Flying Tigers - I've always liked their story, and with the addition of several scenarios in one of the Check Your 6! books that was released recently, there are now something like fifteen scenarios published that include the Tigers. I have no aircraft for this project.
Wake Island - Another one of those stories that pull me in again and again. However, while I look the look of those Marine Wildcats at Wake, after the initial Japanese bombing attack, only four remained, and they faced Mavis flying boats after the initial attack. I can't see buying a ton of flying boats for one project - they are expensive! Perhaps I can do something from the Cactus Air Force scenario book as I do like the look of those early Wildcats!