I would go ahead and turn regen sucess to "0". Thats what I did to my tune, dont know if its necessary but I am code free! With that being said you might look at shutting off any and all dpf related codes. I've got a pretty nice running dsp5 setup that I'd let you look at for ideas. Its setup as an optimized stock tune,mileage, 20/20 tow tune, 2700 us street tune and a 3000us race tune. Its got tubo braking on stock and dsp3 tunes. Its also the same O.S. as yours.