I started using a Redline box stacked with a Drag Comp late last racing season. On my truck, max hp (or should I say lowest E.T.'s), happens at 93% fueling. Anything above that, and it runs the VP44 dry. The nice thing about using the drag comp as a stack, is you can change the low end fueling (for building boost, and the initial launch), and set the Redline for the top end fueling. For example at high altitude, hot tracks, I set the comp on 3x5, and at low altitude cool tracks I set it to 5x5. Both times I leave the Redline on 93%.
I won my last Wally using the Redline stacked with my Drag Comp.
Paul