How to use a Formaster?

[moebow]

I just tie a knot in the cord for the length I want.  It's no more "fussy" than having to use a wrench to loosen and tighten the U bolt and far less "damaging."  An inch and a half might be a little long, it just needs to be long enough to clear your fingers.  The idea is to not let the elbow strap pull your string elbow forward and it doesn't take much slack to do that.