Here is something to keep in mind, when the Tipo was the popular plane to have servos were large and slow compared to even standard ones today. Just about any modern servos is more then adequate for the job. Coreless is better of course but not needed in the long run.

My current 2m ship has JR 4131's on the ailerons and elevator, 4721 on the rudder, 513 on the throttle and I forget the retract number. All are run off a 5 cell pack using a JASCO voltage regulator.