I became aware of the MTR on reading a paper by Leishman. It is an interesting concept because it overcomes the disk loading limitations of a conventional tilt-rotor for a given landing area. The swing wing could add a lot of complication (read weight) when it is notable that "fixed" wing have moved away from swing wings. There are still the concerns over autorotation during transition, when the rotor is inclined forwards but the wings are not flying. At least there is only one rotor system which could be subject to VRS.
What type of role is envisaged for the machine other than cargo?
I ask because cargo seems to be less restrictive on aircraft planform size.
Mart