OK, I sketched a slot.  The dimension that I have is for the total length of the slot and not from the centers of the end arcs, and I don't want to have to do the math (I could but it's just one more chance for a mistake).  I select the Smart Dimension function and click on each arc and then the box for Slot Types (first picture).  It doesn't work.  It still dimensions from the centerpoints of the arcs.  I have to type in a dimension, hit Enter (or the green checkmark) to set it, click on the dimension again to highlight it, then go to the Arc Condition box under the Leaders tab and set both arc conditions to Max (second picture), then double click on the dimension to set it to the dimension I want. This seems much more tedious than it needs to be.  Any ideas?  SW2010 sp4.