Logitech Harmony remotes work with the DAC, so I'll use that. I'll programme it to work with my other hifi too, then I'll only need the one remote.

The problem isn't me getting remote control of the DAC (which after all is only so that I can change the input to the DAC without lifting my fat arse out of the chair), it's just the price of the unit was a surprise. £400 is just madness.