Has anyone tried one of these sorts of things? https://www.amazon.co.uk/dp/B019Z38XSI/ref=sspa_dk_detail_3
A bluetooth presenter device that can control a mouse. I presume you calibrate by clicking and then it uses gyroscopes to determine where its pointing? Anyway I wonder if its more intuitive to use in VR than a normal mouse. I don't know about turning a tuner knob with it.