Nice. If I were still in the Motor City I'd be all over your offer!
They probably haven't had one in a while, but I've always regretted leaving Detroit before experiencing a Slow Roll. Those were supposedly quite the weekly event!

I'll pull the rear wheel off my hybrid and check the alignment that way. It sure looks close, but that will at least let me know if it is perfect or not. I may even use the wheel to tweak it, but will be proceeding cautiously.