lynn - well, truthfully I don't know yet! I recently came into a pretty good wad of cash that just had to be spent on planes so I splurged a bit and got 130 oz. digital servos with metal gears.. I'm using 6v packs. I DID notice on the Twist with standard servos and 4.8 volts that with long servo arms to get full deflection there was very little torque to hold the elevator full up. I mean if you hold the elevator with a finger and try to prevent it from moving it was pretty easy to do.. I could actually feel it flying sometimes it got kinda mushy when pushing it hard.

I went to 6v pack and it helped, I did notice a servo speed increase and some maneuvers seemed a bit better. I know these new servos for the Funtana are overkill but I just wanted to try them as they're destined for a Funtana 90 or the extreme flight yak at some point in the future!