Eureka! I completed my first flight inside the box on the new motion system and it worked great! The past few days have been spent mixing and matching control heads and valve bodies from an eBay lot I purchased.
My son and daughter took turns too. Technically my son was the first passenger because I was still doing some calibrating. I got the test bench program set up to respond to joystick input.
The platform is very responsive and sensitive and the effect of the pitch and roll is very effective with no outside references.