Clamp on track brake stress question

....The little bolt isn't about spreading braking load over a 3rd point - as you say the forces are forwards, so it would need to be anchored into the fork crown to do that, like a normal calliper brake...

Exactly what I was trying to convey. In any case, I've been riding with the bolt totally screwed out (away from the fork) since I bought it. Works perfectly fine with no judders to report on. I guess it doesn't make a whole lot of difference here or there.