I just want to make sure if I understand this correctly?

1) You cannot change the "internal balance" on a real drum kit? (you cannot have more or less kick/snare etc., nor can you change reverb levels). You can change the drums volume in the overall mix but not the internal balance?

2) You cannot change (or mix & match) the internal samples used on a real drum kit? (no using the kick from drum kit 1 on drum kit 2 etc.)

3) You cannot create your own drum kits with either BITB samples or your own samples?

Maybe I'm wrong on this, not sure?