Since you will already be using two controllers, maybe you can use the free channel to gang two motors together and double the power on the roll. This thing would start to get heavy though... Are you using the brushless motor with the belt? Or the standard servo? In my standard 360 gimbal, I see the most wiggle and slop from the belt and pulley. I would much rather have a gear setup with anti-backlash system like this- https://sdp-si.com/eStore/Catalog/Group/205 I wish I had a spare gimbal to do some development on! Mine is constantly in use. Nudge nudge.. Tabb.