Hi Udenjoe.
In your recommendation you would need a merger going into Octa (out/thru to in) and the keyboard at the end would cause a midi loop. This is what I was trying to avoid. The MD isn’t really an issue in this respect and I need sync… Thanks for giving it a crack!

NRain the XT looks like the all in one solution.
Just trying to weigh up my options. I could get another cheap merger and another synth/master keyboard for the price of the XT!