Ok, thanks for that, you have some very good points there. I was planning to make a walker so I could use the extra weight for the weapon, but I see now that may not even work. Maybe for a middle weight though.

Short of using a gas turbine, air motors are the fastest motors I could find (unless anyone else has found anything faster). What motors are other people are using to power their discs and whats the rpms if you know it?