Thanks Bob My guess is that many people move to this centerline wheel that have the Planewave L-mounts. The reason being because it distributes the weight evenly so no matter how you rotate it the balance of the mount stays constant, this is important for the L-Series. They only have a maximum of 3 amps for the drive motors and you need to account for the both axis of the mount so really 1.5 amp max load. Its not really a problem if you balance your system well but it takes a bit of understanding on how to balance 3 axis instead of 2. I can do 11:45 EST today and I'll have time to spend then.