Well after a few attempts I'm finally happy with the cantilever arms for my FrSky Taranis 9XE, I have also left a little extra arm length for if I want to attach an FPV screen to the handle.
The cantilevers slide over the existing Taranis arms sitting on a shoulder and are then locked on with a small spring clip which is retained to the arm with a little Para cord.
As you can see I've had several goes at this, the first arms were to short, then they were too deep fouling on my hands when using the sticks, this continued when I made them less deep, so finally I angled the arms upwards.
So there you go, a nice little project with a real benefit to flying.
I'm busy working on my blog posts. Watch this space!