Thanks for your reply. I've ended up using the Impulse purely as a keyboard controller. I found the Automap software pretty invasive and if the Impulse didn't mount correctly it caused quite a bit of trouble stability wise.
I will, however, give it another shot when I have a gap.
Nuendo 6.5.35/64bit- Windows 8.1 -Nvidia K4000 - RME - UAD