Hi Lynn, "29.6" is just my reference value from some accessible surface of the clutch disc, in fact, it doesn't mean nothing specific to the flatheads. I set all three fingers to this height, should be OK, but haven't tested it yet.
Believe me or not, none special tooling or machines been used for making the rests. Only very skillful craftsman and good idea
If needed, I think some more could be done
