Oooh, we're already looking for a way to carry this into net year's project. That's a good one.
Tabulating could take all night!
Left thumb on top; right handed.
I've always fired rifles left-handed since I was a kid; probably since my left eye has always had the best (20-20) vision.
When I was in the Army I had to have a black plastic shell deflector on my M-16 or the ejecting casings would hit my face and burn my cheek. A pain sometimes, but even today trying to shoot a rifle right-handed seems awkward and unnatural.
I shoot a handgun right-handed always; sighting through my left eye. Talk about quirky!...
Anyways, good luck with the project!