Excellent. I'll call Paragon asap!

Yes I am scaling, but my scales suck - it's a proportional (read: cheap) system, uses bathroom scales. I need to upgrade, I know. But I do scale the car first. It's pretty repeatable and I've tried moving the scales after to make sure I get the same result. I'm within 1% cross weight and about 51.5% up front.

Thanks for the advice. Now all I need is a competent helper (I have an enthusiastic 2-year old, but enthusiasm and competence don't necessarily go hand-in-hand!)