I did have some weird driver issues and a BSOD getting the drivers working. But after doing a "repair" on them it seems to be working great. Couple knob caps are missing but pretty sweet for free! Now I am a bit ignorant on having 2 interfaces like this.... how do I hook them up to use both? I am assuming the right way, and i guess only way, is to optical out of the MOTU into the optical in of the saffire and it should show the inputs on the saffire as adat in 9-16 in the daw right? If yes, I see optcal cables in 5 mm and 8 mm. Is the 8mm worth getting? Make a difference?