I'm reviving this thread because I recently became aware of a cool alignment tool that uses your phone.
Lately, I've been using the string method of alignment and putting the measurements into this web page (
https://robrobinette.com/DIYAlignmentCalculator.htm). This seems to work pretty well but it is a bit clumsy. Using inches I can measure to about 1/32" but then every measurement needs to be converted to a decimal measurement. It's not a deal killer but a pain. I thought it would be cool to somehow streamline the process.
Then I found out about the Gyraline wheel alignment system. It comprises of a plastic jig to chuck your phone in and you download the app in which to enter your toe and camber measurements. The app does the rest. It measures front and rear toe, camber, caster, and Ackerman angle. At the moment, the app is for iPhones but there is an Android version that is currently in beta. The price is US$139.98 and you can get 10% off to register your email address.
I do have a hesitation though. In order to get the rear toe around the centerline of the car, it requires you to take an angle measurement on both sides of the car. The measurement should be taken on two opposing positions of the car that are "hard" points by which I mean will necessarily be the same angle to the centerline on both sides. The suggestion is to use a door glass or a frame member. I would hope that those angle measurements can be stored for later use since if you use a frame member, You'd likely have to take off a wheel and that would mess up your alignment. I think the rear part of the frame inside the rear wheel would work. I'd worry that measurements at the window might not given the "soft tooling" and manufacturing tolerances Lotus used.
If you're interested, you can get it or ask questions about it at
https://gyraline.com/.
