It's a longer story than I have time for, but after doing significant rework of my suspension I needed to do a corner balance. I had done a ride height adjustment, but I don't think the floor is perfectly inline with the suspension mounts. I was driving around and things felt a little off kilter.
I used a cheap ($36) scale, Model: PCR-3115 that can measure 300kg (660 pounds), just enough to weigh an Elise with a half tank of gas. You can find these by many sellers. I got mine from Amazon.
Amazon Link (there used to be a picture):
I used a very straight 10 foot 2x4 to try to get all the scales to be flat and in the same plane. (The scale has adjustable feet that worked very well.) Then I put some 2x6's next to the scales to be able to roll the car to unload the suspension between changes, and reduce the max weight of the scales.
Once I got it setup, it was actually very easy and kind of fun to do.
I used this website to do the corner weight calculations:
Then I just copied the values into a text file for posterity.
The drives since then have been much better. It was odd, because in the end we only turned the front left shock perch about 3/4 turn and it got it nearly prefect. I am using the Penske shocks, and I was able to adjust the perch without taking off the wheels, because I don't use the set screw (due to Fred's suggestion.) Now I want to get a ride height adjustable shocks on my other cars so that I can do this again.
You can see in these couple pictures how I had things setup.
2005 Laser Blue Elise, base model (with 2 oil coolers), Bridgestone RE-01R 205/45/16+245/40/17, 4Tress harness bar, 6-Point Schroth harnesses, Cup Car Ohlins, Blackwatch Racing adjustable anti-sway bar, ekological HID kit, Sector 111 rear panel eliminator, 2bular 7" single tip exhaust, Sector111 DOWNLow seat, Sector111 tiny mirror, Braille battery, LidBone, multivex side mirrors, snorkel delete, infinity kappa 42.7 front speakers, acousti-stuff behind rear speakers. It adds up so quickly.