That's a 9g servo isn't it? I'm using Saturn Feather 6.2g servos in the Blade that I'm building. I got them at the Sandown show from West London Models. I think they were £11.99 each. I'm already using the same servos in an Ikarus shocky Extra and they seem to work fine. There's also 5.4 and even 4.4g servos in the same range but I wasn't sure 2g/servo was worth an extra £5 a time. Also the 6.2g servo has a higher torque figure which is probably a good thing for such large control surfaces.

Cliff