Session5, 3cmx3cm stack mount with integrated RX holder.

A quick 45Deg design put together for a show piece which ended up with some unique features.

Pros
Fits on top of a 3cmx3cm stack.
Designed to hold a FrSky X4r in it's base
18g (excl. bolt/nut)
Can face either way, although the small menu button is tricky to access if you mount it backwards.
2 piece design allows for glass smooth surfaces on both sides.
Areas needing removable print supports are well hidden.
You can use a strap or zip ties to secure it to your frame.

Cons:
You need to deal with a bolt/nut to get the cam in and out.
If you use bolts they will need to come from the bottom with nut on top.