I got my roll center numbers from a spreadsheet that I wrote to calculate roll centers. It gives numeric output as well as graphical output. It is written in Microsoft Excel which you would need to use it. A free download is available here. This particular sheet has my TC5 numbers for a roll center at ground level and 6.5 mm ride height. I am using the top holes in the Aluminum bulkheads. The long suspension support *. The camber link position you can see on the photographs.
Do you have this spreadsheet available to email to me? It looks as though Hometown has closed down. If you do, here is my email address:
[email protected]
Thanks,
BBG