For anyone who wants to try the new 600HP v1.2 beta, here is a link to download. You'll want to remove the .enc tune file from the zip folder, and put it in the "custom files" directory of your nGauge SD card.
http://www.spar<--->tandieseltech.com/600HP_QR.zip
Remove the <---> in the link to download.
This is the beta for our 600HP Quick Response. You'll find snappier throttle response (for the guys who had/have our 6.4 tuning, you'll find similar response to it, minus the jerky nature). Shifting is firmer, but not harsh. Shift scheduling is also slightly delayed at low throttle in 2-3 and 3-4 to prevent lugging with the aggressive lockup. I think most of you will find that drivability improves with this, especially with any tire size larger than stock, or stock 20's. I'll also mention this file has additional holding pressure for the transmission, and should help with C35R and C456 clutch longevity even more than the existing files; will most likely be incorporated into the v1.2 update.
This file is already based off of the 600HP Enhanced, so it does have the same lockup.