Hmm, alright, thanks for informing me of this. I am trying to figure out what stuff I can do with python and XML alone and what stuff I need to make DLL/SDK changes for, while at the same time making leaderheads. It can get confusing.
What exactly are you looking for? I started to update the promotions/planes from this mod into for 3.19, for personal use, and can upload what I create here, I was intending to create some balance, while not having alot of "clutter".
If anyone else is wondering, I was going to create three "lines" of aircraft.
1: Fighter: Fighters have high Interception %, Low bombard % (if any)
Fighter (a bi-plane/ww1 era fighter) ----> Intercepter (renamed from Fighter in BTS, ww2 era fighter) -----> Jet Fighter (middle/late 20th century) ---> Stealth Fighter
2: Bomber: Bombers have high bombard %, weak vs Naval
Bomber (ww2) ---> Strategic Bomber (vietnam) ---> Stealth Bomber (modern)
3: Ground Attack: Bonus vs Land-based units, moderate interception %, moderate evade %.
Airship (ww1) ----> Close-Air Support Fighter (ww2) ---> Strike Fighter (middle/late 20th century)
In addition, I was going to add three techs, to create some spacing (roughly 4-5 direct techs between each upgrade), 1 of the techs will open up the advanced promotions (Radar).
If your wondering the techs are Aeronautics, Jet Engines, and Radar