I created this thing to mount my HK 2 axis Mobius gimbal to the Trifecta. I designed it on SketchUp, and it's my first design ever, so it's very very crude. Replace your Mobius or GoPro mount from HK and mount this instead. The long platform can be ziptied, double side taped or screwed in to hold the original gimbal rubber mount. Currently I'm still trying to get rid of the jello by replacing the rubber with zipties, no luck yet.
Share it, use it, mod it, do whatever you want with it. Just as long as you're not making a profit and that any mods you make, you share it with everyone too.
Requires M2.5 x20mm or x25mm screw to secure it to the Trifecta frame. I'm still looking for them, currently held on by bamboo skewers, which might be the reason I'm getting jello still.