Sorry Im confused, do we need to buy anything to implement these rules to our game?

Hi, played A&A the first time with another person yesterday, I used a mixture of the House Rules and some of my own custom rules, I played Allies and a friend played Axis. I really like the armies that a nation could field, although, the Italians got real rich during the game (took north africa+egypt) but they couldn’t exploit it by fielding their own tank armies to push into Sudan which was held by a mix of UK and French colonial infantry. Moreover, I feel like the Germans are way too OP and gotta be nerfed. I divided the Soviet forces into three major combined arms area groupings, the Leningrad Front, the 1st Belorussian Front, and the 1st Ukrainian Front, each contained large numbers of infantry supported by artillery and AAA, as well as fighters and an Army Corps-But then they each got destroyed by the Germans, who fielded gigantic infantry stacks to absorb hits and none of their Waffen and Panzer armies were disabled. Their air force is also too OP. I rebuilt the Ukrainian Front from scratch from Stalingrad and formed two Tank Armies which encircled Army Group South, but there is nothing holding back Army Group North, which now contains two reinforced Panzer and two Waffen armies. D-Day failed as the German presence was too strong. The 2nd Ukrainian Front failed to eliminate what’s left of Army Group South and was forced to retreat, while Army Group North quickly overwhelmed the hastily formed Moscow Front.

Sorry Im confused, do we need to buy anything to implement these rules to our game?