Flexplate is not fits the torque converter

So, what I've bought is TCI Forged Flexplates 145700 (as TCI tech spec recommended) and it's "Engine Balance:Internal", that does mean I have no balance? I need some flexplate with the external balance like ATP Flexplates Z-332 with external balance? what will happen if I'll use the plate I've bought with no balance?

Just checked - I have TCI Saturday Night Special Torque Converters 141500 and it's "Balanced:Yes" so there no issue? sorry for the stupid questions, first time I doing anything like this :) If I get it right - this combo (engine and transmission) should be balanced either internally (engine), or by flexplate or by converter?