I've recently built a super simple gimbal (link), for use with a GoPro 2. I've had some strange issues with it being rather "twitchy" using the gains suggested in the article. Does anyone know what this could be caused by? It stays level really well on my V-Tail quad, it just shakes like crazy even when the craft is level. Can this be adjusted by changing gains? Do I need to invert my gimbal (as I've seen in a few different designs)? I feel like I'm super close to having an awesome FPV platform, but I just can't quite get it right. I can post a video, if needed.