It would not surprise me if they both come out around the same time, give or take a few months. Being that my MK will stay a medium lift rig for now carrying my GH2 I will keep that setup. I am leaning more towards the Synapse, when it does I will most lively convert the MK rig over. I guess I will have to figure out what to do with the MK stuff when that day comes. I suppose I will build another rig for personal use with them maybe use it as a test rig to do copter experimentation to quantify some of the Anecdotes out there.