Hi Duane,
lead is probably not a good idea as this heavy line will for sure reduce the overall control. As posted above, try to add leader lines of bridle line. I think one can almost neglect the small extra weight.
However, there are more tuning-options. I think your kite has usual yoyo-stoppers attached to the leading edge?
One way to increase your chance to hit the stopper is to add one ore more pairs of "safety stoppers" below the original one, for example made from wire straps. This is often used by LevelOne on their kites, see for example the Pictures Here.
Another modification are roll bars as invented(?) by Tim Benson on his Deepspace. This things make it almost impossible to miss the stoppers. They have some more sideeffects, for example they tighten the sail and prevent it from being wrapped together in multiple yoyos. The drawback is that they add a real ammount of weight to a somewhat unusual area of the sail.
Besides this "hardware" changes, there is another alternative used by Carl Robertshaw which I know as "yoyo-line" or "h-block". Idea is to take some leader lines, wrap them around the sail one time and then add a horizontal connection between those lines on the back of the kite. If this "block" is attached at the right position, it will prevent the lines from sliding down the leading edge. The line is so long, that it does not affect the kite in normal flight. In this case, even normal yoyo-stoppers are not necessary anymore.
Oh, and practice, practice, practice ;-)
Good luck!
Andreas