I have managed to control it using Oculus tray tool. The important part for me was don’t start the tray tool until your sat in the cockpit of plane, then it works. I guess this makes sense when thinking about the numpad keys as these are active while your playing.
I was not so lucky when trying with the debug tool, tried the same order but it did not like it.
I have had about all I can take for now testing 
happy with the result but will come back and try this in a bit more detail later but for now it works and is doing what I hoped it would which is prevent half of the judders in VR. By fixing to 40hz it only judders when my graphics card can’t reach 40. Before it would also judder as it fluctuates from 40 up to 80, so now it’s only the few times when I can’t reach 40 - happy days.