Comments on my economic plans are very welcome as I do not have any experience with the economical system in scenario 2. Note that this is only turn 7 and things are still ramping up.
I know you to be an experienced player, but Scen 2 is just a trap waiting to spring on the IJ economy if you are new to it. Those extra goodies, particularly those pilots, require much better HI use planning as compared to Scen 1. Use the following notes as you see fit, most a likely only reminders for you ... no insult intended.
Mike always stresses to "make haste slowly*" as it applies to building factories.
First and foremost, the IJ economy requires a plan. A very detailed plan that begins on 7 Dec and runs through June 46. Seriously. Open up the Industry manager in the game and look at the top categories. You need a plan for each category. It is very easy to crash the IJ economy, particularly early in the game. It is much easier in Scen 2 than in Scen 1 to crash the economy as there are more goodies, but the economy is the same size.
Ex: increasing VEH is important. You have 6 factories, increasing each is 6x1000 supply/day. The HI only makes ~20,000 supply/day. You also need supply to fuel your expansion. Yes, you have some inventory in the HI, but not that much. To get to 250 VEH/day, you have to expand these the entire month of Dec. You also want to convert ac models to more useful ones. How many? If you change/increase more than 14 ac factories, which is very easy to do, you are now running at a supply daily deficit. Oops, did you also want to change/increase some ac engine factories too? .... You can see the trap that many player fall into quickly ... change too many factories too early and you easily run out of supply, then you have to interupt your expansion, cannot repair all the oil facilities that you just captured, ... a mess.
Plan. A highly detailed plan is required. One that you are able to adapt to the vagaries of the war. This is where the IJ failed miserably IRL. They did have a plan at the start of the war, but as the war progressed they struggled to adapt due to internal politics.
BTW, Tracker is your saviour as IJ. It is a big help in management.
* ancient Italian proverb