MOTM

>Do you care or do you like that symmetry between the modules?
>If you like the symmetry, would a solution be to not mount the modules
>together.
>If  I nudged in the left and right column of knobs on the FS, would that
>still look OK?

I prefer nudging the columns inwards, just to leave enough finger 
space for whatever module is on either side of the FS. That extra bit 
of finger room would be "handy" in any case (excuse the pun).

I don't think the symmetry is ruined by nudging the columns inwards. 
The FS is unique enough with the big knob now, a little bit more 
customization only adds to its distinctiveness. Bravo, I say.