Hi,
For live performance, actual MIDI Start/Stop messages (only) would be useful addition to the current choices for the Transport triggers, most of which seem to act on "any MIDI".
Re: CCs -
I'm now experimenting with using a Launchkey 25 to drive a potential Unify live setup. Separate from the playable keyboard, there are buttons including a play button and a stop button, which send CC 115 and CC 116 respectively. Having these buttons start/stop the Unify transport would be ideal I think.
Sounds good!
Of course, the CCs in question could be anything depending on the gear in use, so probably being able to specify a Start CC and a Stop CC in Unify (presumably at value of 127, if that is not also configurable) would provide maximum flexibility for different people's gear. Cheers!