Thanks Gents for your replies. I can confirm that the software in both desks is current. An example of just one annoying problem encountered is: If I’ve set up input channels 1 – 20 across the 112 on Layer A and save to a memory stick and then attempt to load this into the 80, it will only show inputs 1 – 12. I realise there are physically less faders on the surface of the 80, but I had hoped that the remaining channels 13 – 20 would’ve appeared on Layer B. This does not happen.??