Thanks for the info Werner. I sent them an email to confirm whether it will record from both serial ports at the same time. If so, it would probably do what I need, but of course it's also pretty pricey. I've been told that a serial data recorder shouldn't cost a tenth of what these folks are charging, but I haven't looked into making my own. Maybe I'll wait and see how yours comes out
In the mean time, I already have a laptop for datalogging purposes, but it will be in the passenger's seat. That's fine for the initial flights, but once I get past the test time, I'll need to use that seat for people.
Cheers,
Rusty