Thanks for the replies; of course I had read all this thread (and lots more besides!) but as i had no knowledge of Waspy and ASIOs I didn't understand. I do now. Many thanks esp to Jeremy Oakes whose comments were esp helpful. I've manged to do a practice recording and hear it back too...
Couple more questions you may also find ridiculous so feel free to ignore:
I assume I add pan, effects etc on Cakewalk in mixing, I just use the Soundcraft for gain?
If using for live sound (something I've never done but might well do), would you go through Cakewalk (probably a very silly question)?
Thanks again
RR