Passive Preamps w/ Transformer Volume Control

Hmmmm...I guess a picture is worth a thousand words in this case. I can't picture what this might look like, but it sounds as if I have two choices: use the pigtails or add another set of ICs (my preference) in the chain.

Thanks for the clarification Edwyun.
In fact, I'm using a S&B passive. I prefer this to a ladder type resistor based unit -- which, OTOH is cheap to make (the S&B TVC is expensive); Both of the above where better than the basic rotary switch equivalent; I preferred relay switching than the mechanical, rotary, counterpart.

I have a Django TVC with amorphous core transformers that I would sell if you are interested.