Yeah, I was pretty suspicious of the numbers I was getting. Measured to the outside sidewall of the tire, which isn't the most accurate, but I didn't have a piece of wood (which was a wooden snowbrush/ice scraper) short enough to fit on the rim. After some reading I'm probably closer to -1 deg as I'm at stock ride height.
I actually whipped up a set of fixed camber plates in CAD and was thinking of making them once school re-opens, as I'd have access to the machine shop and waterjet:
My issue with fixed camber plates and E36 M3 strut mounts is that my car is still my daily, and I'm not sure about inner tire wear. Perhaps without much toe, it's not a huge issue? My plan with the fixed camber plates was instead of hammering out the studs on the stock strut mount & using regular nuts, I'd hammer the studs out, drill out to 10.5 mm, and use press-in nuts. That way I can remove the camber plate, and mount the strut mount with bolts on its own, if I was planning on putting a bunch of mileage on my car between events.