Charlie,

To adjust toe, you turn the threaded track bar (drum stick) from the rack itself, you dont remove the track rod end from the taper. The adjustment if therefore infinate, not dependant on full turns of the track rod end..

We run all our cars with toe in pal, toe out will make the car feel very nervous and i've never heard of any car (road or competition) having 10mm of toe out...

We continually check toe during events and make minor adjustments, we acheive this by using a tracking bar, simply a box section bar with two upstands one end touches the rim and the other end uses a ruler, measure front of the rims then rear of the rims and you'll see toe in/out. I'll post you a pic later if you want to see it...

We have optical tracking gauges and access to 4 wheel alignment but we can acheive very accurate settings on event with a tracking bar...

HTH

Ian