General setup we start with is the same as Russ with J at 11.5' per class rules, though I don't often measure this. At one time we had to pound blocks into one side to get the tip centered, but I'll have to admit lately most of our blocks have gone missing and it has not seemed to matter. Blocking forward may push the bend up the rig as you tighten the uppers or apply backstay. Blocking sides may help keep the stick in column, though some of the current ideas on light air tuning want the stick to sag to leeward. We're also tightening the headstay along with the rest of the rig as breeze increases. In theory this only reduces headstay sag without pulling the mast tip forward.
