Servo advice

Darth Tuapawa

New Hunter
Hey guys
Just after a bit of advice from you Mando's with remote control Rangefinder set-ups. I'm in the midst of making an ARC Clonetrooper and want to control the movements of the RF via a switch in my gauntlet.
I've found what I think would be a suitable servo (small enough to fit in my helmet but powerful enough to lift the stalk and rangefinder) but seeing I know absolutely nothing about servo's (and the shop doesn't seem to be to much help) I thought I'd ask the experts :)
Bear in mind I'm situated in New Zealand so getting a servo from this website will probably be my best bet.

Cheers and thanks in advance!
- Darth-Tuapawa