It's obvious that both the La-5 and the 205 suffer greatly in comparision to other aircraft (especially since neither plane seems to have utilized drop tanks). I'm all for realism in the flight models, damage and gunnery models...but "fuel realism" is going to be subjective in a sim regardless of how you do it.
The proof is in the fact that these planes didn't utilize drop tanks. It wasn't required to fufill there missions or they'd have them available. Since this is an artificial application of real world aircraft some flexibility in range should be allowed for short legged craft (outside of historical scenario's ..maybe) to accurately simulate their real world applications.
hmble