When I built my Tiger 60, back several years ago, the only servos I had were Airtronics standard 94012Z's which are the equal to the S3003's that you are talking about. They worked out just fine.

I used Sullivan Goldenrods for the elevator and rudder in place of the stock wood dowls pushrods, the ones with the metal rods on the ends. I anchored the Sullivan tubes at every other former in the fuselage. As it turns out, the standard servos were strong enough to flex the tubes during 'hard' maneuvers so that the elevator and rudder lost efficiency and the plane would sort of flatten out. I removed covering from the flat bottom and epoxied the tubes to each former which fixed the problem.

Yep, those servos will work just fine.

CGr.