Almost 2 years ago I set out to stockpile 20,000 perks so I could buy the Messerschmidt factory that builds ME-262's. Periodically along the way I would treat myself to a perk ride or 3.
When I logged tonight, my last sortie (2 B-24's, 2 B-17's) put me at 20,001 perks!
I have decided to not limit myself to just ME-262's. I probably wont fly the SpitXIV much, but the Tempest and F4U-4 will see heavy use along with the Messerschmidt.