Many thanks to Steve R. M-15 #119 and his link to the daysailer pdf on Traveler Systems. It finally permeated the nearly impervious crust to my feeble mind that the split tail is just another means of adjusting the hight of the triangle. Many thanks to Steve, and to the fine services of this great meeting of the many Montgomery-fixated minds. John R. Butler theoldcat@cox.net