Soviet tier and ostheer tier building suggestion

Reduce Soviet Tier3 and tier4 fuel cost,make it both 90 fuel initially,manpower stay the same but! has following change.

Once you build either T3 or T4, you can build the other one just with 70 fuel

Soviet T3 can only build half track initially ,
T3 lv1 upgrade cost 20 fuel, unlock T70 production
T3 LV2 upgrade cost 30 fuel, unlock T34 production
T3 LV3 upgrade cost 35 fuel, enable T34-76 upgrade to T34-85 only near the base, with fuel cost 20.

Soviet T4, can only build SU-76 and rocket launcher initially,
T4 LV1 upgrade cost 30fuel, unlock su-85 tank destroyer end enable SU-76 upgrade with 85mm gun(su-85B) with ammo cost 40.
T4 LV2 upgrade cost 30fuel, unlock 122mm M-30s gun,enable su-85 upgrade with 122mm M-30S gun or just produce su-122 from tier4 building.

Some notes: 122mm M-30S gun is not the gun IS2 equipped, The SU-122 (from Samokhodnaya Ustanovka 122 mm) was a Soviet self-propelled howitzer or assault gun used during World War II. from wikipedia.

Some thoughts: if soviet tier building can be designed like this way, T3 and T4 will both have acceptable anti infantry and anti armor ability,the game can be better if player have quite different choices of their tech, even for 1v1, player should be able to build all 4 tier buildings so as to increase variability of gameplay, it will give player more choices in their tech and increase more strategic depth of this game.

thanks for reading, ii just want to state again that the fuel cost is just for reference.