On the other hand 4x20 Hispano are deadly. Now if you look at 2xShVAK or 3xBerezin - the difference isn't that significant in comparison to 6x.50 cal M2 vs 4x20mm Hispano.
Bottom line, perking La-7 3 gun version makes no sense and the difference between them is marginal, I can't say the same for F4U-1C but yet I think there is no problem to unperk 1C variant.
I think you are wrong on both accounts:
50% more firepower to one of the best fighters in game at no weight penalty !!, what it can't beat, it can outrun.
The F4u1c was perked for a reason, so was the Tempest and F4u4, now it's the 50% better 3-gun version to get a light perk in order to make it less dominant among the La-7s today's usage of 100%
