Keyed AGC, deal breaker?

[Electronic M]

Aluminization increases CRT brightness and eliminates fiddling with an ion trap. A very strong non-aluminized tube can be brighter than a moderate strength aluminized tube.... Aluminization makes the most difference on tubes that are near dead...an aluminized tube will give a picture with a gun slightly too dead for a non-aluminized CRT. Either will work fine if the gun is strong enough and the chassis is working properly.