SGCD and Directstream Jr combo!

Hello folks, I will be using my SGCD/pre as my standalone analog preamp (using the balanced input) for my phonostage and also to run a Directstream Jr’s balanced outputs to the SGCD’s balanced input, (using a audiophile xlr switcher to accomadate 3xlr input/1 output to SGCD balanced input.
My question is if this is all kosher, which volume control would I use, the SGCD or DS Jr’s volume control.

Appreciate your time folks.

When I ran that combo I always used the SGCD for the volume control. Not sure why you wouldn’t?

DS fixed volume at 100 and then use the preamp volume control.