Wings at War Winter War Aircraft Ratings

I've made a start on the Wings at War rules mash up for the Winter War, with a comparative analysis of the different aircraft in terms of Energy and Maximum Height. This was based on an evaluation of aircraft performance in terms of speed and ceiling, together with some consideration of other factors like wing loading and power to weight ratios. I used the aircraft ratings from Scramble for Britain as a bench mark, with some wiggle room to cater for the different parameters of the Winter War, specifically the lower altitudes at which the fighting took place. Here's the end result, although there are a few things I'm not quite sure about, so I'd appreciate some input. 

The Energy ratings for the SB-2, Blenheim and DB-3 bombers might be a surprise but these were all very fast and very light in comparison with contemporary fighters, so I've rated them accordingly. The I-152 has a loaded rating as it was mainly used for ground attack, but I'm not sure that a light bomb or rocket would really impact on it's performance that much, especially at low level? I've also given the R-5 and Po-2 a loaded rating but I doubt they were used much for ground attack, so I may have to re-think that one as well. I may well come back and jiggle the numbers around a bit, but I'm now moving on to pilot ratings, section numbers and the set up conditions.