L/R Balance adjust (or split master level out fader) in SoundID Reference for Headphones?

Heyya! I'd love the option of adjusting the L/R Balance in SoundID; I have a fair of HD600s with a 1.5 or dB drop on the left side, while all my other headphones are solid. Being able to adjust for this imbalance in the saved preset would be superb when switching headphones.

Thanks!

Dustin