Yeah... My work around is simple...
My korg radias does not send the correct midi message to Reason to say start playback.
It does send a constant clock.
I needed an external source of the midi start message. For this I use a korg ddd1 drum machine.
Once my msg has started whatever software function reason needs started I am working.
I then pull the ddd1, and attach my radias. Reason syncs to the clock from radias and I can change the tempo of anything in reason using the tempo and clock from my Radias.
I will be getting into the midi implementation chart to find the start message stuff, and map that to something on my radias. This weekend i hope.