ya... I'd probably choose 100 and 200 turns as the cutoffs for recording.

After that point, you'd be able to play it however you want... no restrictions compared to how you play normally.

the countries you paste it on would be instantly at that level btw

so for instance: you created 16 countries at the same time, waited until each has 120(100) turns
Then, you record a 99/100 turn startup using country #1, then chose to apply it to all 15 of your other countries, you'd have 16 countries sitting on turn 99/100 (I think 99 makes more sense, so you're still in protection) with identical country stats, all with 21(100) turns available to be played.

did I explain it well? ;p