That light Alloy they're talking about is not aluminum. It's called Chromoly Steel. And it was used in the Yaks as well as La's.
I actually prefer the La-5FN to the La-7, but that's because the La-7 is to easy to get some kills in. The recoil on the FN gives me a bit more time to choose my shots as I have to fire in short bursts, rather than just let loose without having to manage the recoil like the La-7. Good plane none the less, and I still love it.
