I use booster tabs on a few planes. These are on a 1/4 scale Corby Starlett on the ails and rudder. The other is on a foamy Zoomby and a few othars with an oversized rudder. Both were tried with and without to see the difference. In all cases it was like putting an oversized servo in them with much more speed. I don't know why they aren't more prevalent in the bigger 3D planes where they're using two and three servos in the ails. Could save a lot of weight in servos and batts.

Gord.