I used to use the KMAC eccentric bushings on my rear subframe to adjust
the Toe In. I was having alot of problems with them moving, as well as coming
loose on a regular basis so I decided to do something about it. What I ended
up doing was getting some small metal notched plates from Andrew Sanchez at
bavarian motors ltd that do the job nicely. Basically you weld these notched
plates to each side of the bracket that serves as the outer control arm mount.
This combined with a longer bolt, and some notched washer plates enables you to
lock the toe in by tightening up the bolt. You of course have to slot the subframe
bolt hol so you can slide the bolt forward or backward.
Here are some pics I took of the job.