RE: Nitromodels PREDATOR RQ-1B
If a GWS slowstick is the only plane you have flown my answer would be no. I fly both the GWS slowstick and the Predator and they fly nothing alike. 15oz extra weight would not be a problem as long as you balanced it after adding the camera. The predator has a nasty tip stall if you fly it to slow and stall it so on landings you need to keep some throttle to maintain speed. Check out Hobby Lobby they have a few glider trainers.