I see that FT advertises that you can scale any of their master series planes using the scaling factor of 185%. Is there something special about the size of the master series that makes 185% the correct scaling factor? I'm interested in purchasing the new FT zero plane and scaling it up. Would 185% be the correct scaling factor for that plane also? If not, how does one figure out what a good factor would be based on the size of the plane being scaled?