Graviman,
you are correct on several points;
those are r/c choppers in the "intermeshing" photo.
Counter rotating disks(such as coaxial props on a single shaft) nullify gyroscopic precession effects. You might expect twice the resistance to movement out of plane, but in fact it is near zero.
I fondly recall a discussion on a gyro forum with Chuck Beaty about this. It is one of the few times he's had to eat crow. He finally resorted to doing a hands-on experiment and was stunned to discover that the forces do indeed cancel as I'd learned from searching on the net.