I've been booked for a 1-off concert this Friday to mix FOH, and also to provide tracking for someone else to mix-down later. I've tracked before using my laptop with Reaper and a USB connection, but there have been a few glitches, and my confidence is not 100%. Because the tracks are so important to my client, and he's hiring a camera crew, I'd like to be able to use a second laptop for recording redundancy. Has anyone done this before? Maybe with a USB hub? I also have an X32 Rack that I know could do what I need using AES50 to tie it to the mix console, but space to transport everything in one load would be an issue.