Your going to need a retract servo, Also on of the problems encountered with the VQ Dego (I have one) is the spacers they give (if you got the VQ retracts with the kit) The 2 wood spacers are too thin to allow the gear to lock in the up position, All you have to do and cut some 1/4 thick spacers and they will lock up and down, Took me a little while to figure out why they wouldn't lock but I took out the 2 small wood blocks they gave and cut some new ones and they work perfectly now. As for the servo, A retract servo will go from one side to the next side with no centering. It's like a on off switch. It's either all the way to one side and goes all the way to the other when you hit the switch. Hitec makes a pretty good one for cheap money and they are a lower profile. A standard would not fit well in the Dego either. Here is a link to the servo for $29 and a Futaba for a little more, Both good servos.
http://www.servocity.com/html/hs-75bb_retract.html
http://www.servocity.com/html/s136g_...t_retract.html
Just noticed your in ISRAEL so these links won't be of much use to you but gives you an idea of what you will need.
Dauntae