Problem with Russian tech tree

The Interceptor lvl.6 in game is an Il-10.

The Il-10 was a ground attack aircraft and would fit better as a Tac Bomber. Another plane that would fit this role better is the Yakovlev Yak-15.

Also there are a lot of typos in the names.:

Armored car lvl.1 should be BA-20

lvl.2, BA-6

lvl.3, BA-10

lvl.4, BA-64

Light tank lvl.1, T-18

lvl.2, T-26

lvl.3, T-37

lvl.4, T-70

Medium Tank lvl.1, BT-7

lvl.2, KV-1B

lvl.3, T-34

lvl.4, T-44

lvl.5, T-54

Heavy Tank lvl.1, KV-2

lvl.2, IS-2

lvl.3, IS-3

Tank Destroyer lvl.1, ZiS-30

lvl.2, SU-76

SP Artillery lvl.1, SU-76 (you used this twice)

lvl.2, SU-122

lvl.3, SU-152

SP Anti Air lvl.1, T-90

lvl.2, ZSU-37

lvl.4, ZSU-37/2

Interceptor lvl.2, Yakovlev Yak-1

lvl.5, Yakovlev Yak-9

lvl.6, Ilyushin Il-10

Tactical Bomber lvl.4, Petlyakov Pe-2

Strategic Bomber lvl.2, Petlyakov Pe-8

Naval Bomber lvl.2, Ilyushin DB-3

lvl.4, Petyakov Pe-2 (used twice)

Destroyer lvl.1, Novik Class

lvl.2, Gnevny Class

lvl.6, Ognevoy Class