Hi
I don't doubt that the Unihedron meter is the right tool for the job, but, as very much a noob, I can't justify the money, not when there are other items I still want.
Having just looked up the meter again, I also noticed 'there's an app for that'!!
I doubt it is as good as the meter, but, still better than nothing.
I think my better half has just volunteered to have it on her smart phone!
https://itunes.apple.com/au/app/dark...602989060?mt=8
I expect there are other apps as well.
Philip