[vanir]

I've decided to change the engines on the B series to DB 603Aa.
Just because the B was basicaly used in the destroyer role most of the time.
So high alt performence is where it's at.

For the D I'm still not sure whether or how to adjust things.
Your hypothesis about the different DB 603s perfectly matches my own.
With the D-15 and 152 beeing the definite new mainstays, I think even the 603E is a bit stretching.
What just crossed my mind was the probability of a Jumo 213.
With the Ju 388 out of the way ( basicaly a worse plane for all the jobs the 410s good for) and the Ta 152 H only beeing a secondary, suplemental fighter in the jet age, the 213 E-1 might be an option.
If not the E-1, then maybe the A-1...
Questions...questions...

A very nice choice in my opinion mate. From what I've read the D variant was earmarked for a wide variety of engine choices depending upon what would be immediately available once (if) it entered production. One of those choices was the JuMo with annular radiators specified and that would be a seriously interesting and unique look to the 410D model IMHO (could D-9 nose/nacelles be fitted to the 410D model?). Plus something interesting, heavy fighters which did make production sporting the JuMo 213 (such as the Ju-88G) were sometimes fitted with MW-50 boost too. The 213A should be readily available since the RLM was convinced to switch future 190D production to the 603 series engines and as you mentioned JuMo should be able to keep up with Ta-152H/213E production pretty easily...and twin engine requirements backed off in favour of BMW and DB engines.