Gonna chime in quickly, since someone will bring it up here. People are already raising pitchforks saying they stole Encline's work. These guys have most likely been working on this design since last year, which would be before Encline started his custom.
Based on the silhouette, it seems they made a bunch of changes from Don's design. Their version has 12 wheels, compared to the original 8. And I think Don's design had the entire altmode become the robot mode? This design is suppose to have the altmode split into a robot mode and a separate base mode. So its best to wait to see the actual design before we decide to raise our pitchforks.
But I will acknowledge, they did get the idea from Don's work. The guy should stop drawing awesome toy concepts. Then we won't have to worry about 3rd party groups making them real.