Guys, Im looking at a Drag Comp to stack with my smarty. I'm wondering if the Drag can be turn off and then have the smarty running on level 9 sometimes. I love my smarty on 9 and hate to get another product that has timing and have to turn the smarty down to level 8; when the smarty has really great timing from what i hear. I know i could stack the tst PM3 which i am looking at too, but i think that the edge has better driviablity for my HO from what i understand. Or should i just forget the boxes and look at mach 4's. Thanks, Cole