I was plugging the various level 2 systems into a SD game on BJRM and none of them showed a very impressive improvement over Hi-Lo except for the Hi-Opt II system. The improvement was impressive. So how come I hardly ever hear of people using this system? I would like to know what people think of this system, and how its difficulty compares with other level 2 systems. And it seems to only be available by ordering it from the author. Is it available in a book like all the other good systems?