First of all, I have just built a vector flying wing (slope soarer) and am very much a noob to the sport. A problem I'm having is that one of my servos 'twitches'. It moves all the time even when I'm not touching the controls. This seems to only happen if the radio control is turned on. Does anybody have any clue to this problem??

Second thing I want to ask is what people use as a towhook for hi-starts. Because my plane is a foamie you are quite limited to what you can use.
Thanks for any reply...

Malkatraz Welcome"

First ? some radios/servos will glitch when RX batt is freshly charged, or if the TX is too close to the RX. If this is a brand new system try moving TX away, other reasons could be Radio problems.

The wing You refer to as a slope soarer, in general is hand launched off cliffs and hill tops. Slopes' normally don't have tow hooks, and gliders and sailplanes do. Hi-Starts with a foamie is not the best method, unless You can install a tow hook to a distributed anchor block/plate internaly mounted.

Dan Z

wornboots likely hit the nail on the head.
Leave the plane and radio turned on for a few mins. while working the problem servo, it should settle down shortly.
I use JR stuff and servs are very sensitive to brand new batteries.