Hey, Tom.
Did you see this post?
Goodyear tire infoJust some rarely shared info on racing tires. We test production tires like this all the time...it's useful stuff.
You know I'm opinionated about these things, so keep that in mind.
Anyway...
I would work on the camber plates. I made my own with the goal of having the ability to adjust from 0 to -1.5 degrees. Now, having been through that exercise, I wouldn't do it again. I don't remember what your current camber plate looks like. I really don't think the $400 performance products parts are worth the investment. I think you can make a better camber plate work for less money, but more fabrication time.
Now, a caveat.... I don't like Ground Control the company, from my experience, they have crappy customer service. But, as far as camber plates are concerned, they have a superior product. I plan on installing them in my car over next the next winter. The key is modifying your strut tower to accept them....including installing them so that you get the appropriate range for your tire. That's the hard part. Since it's a custom install, you need to find an appropriate part to use.
My suggestionI'm not sure these are the right ones, but they look like the best compromise.
BTW....Please don't shorten your A-arm, it only makes the geometry worse than it is.