I did think of just getting some foam, and filling in the space around the 2i2 so it will fit the audio 10 case.
but have it removable so that I can still use it for either soundcard.
I wont need to take both together.
I dont use both at the same time at home.
audio 10 is for DJing and live sets and the 2i2 is for producing due to the better amps and controls for the outputs.
the audio 10 was killing his powered speakers with no way to lower the signal being input to them.
and the headphone output has enough amp to run with an input of around -6db as that is what you produce a track to with gain structure