Unfortunately he's made a ton of errors:
A few things I noticed right off:
The p51H specs are way off.
F6f5n speed is too low.
La5 and La7 did not enter service the same month.
Mig1 couldn't possibly do 390mph in level flight.
g10 speed is likely wrong, it was faster than g6 with the engine he lists.
It's still quite an effort for someone to undertake. (Good link too.)
