You'll still likely to have issues with oscillating AFR if your using MAPdot only and the threshold is set as low as 30kpa/s.

Try this:
When you're cruising, open the MegaTune realtime display (on the tools menu) and watch for the "Accel" light at the bottom right side of the screen. If it's trigger Accel during cruise or light throttle conditions, then the threshold is set too low. Try this in different gears and different RPMs while cruising. Mine would trigger Accel while cruising at ~3200 in 4th gear.

I'd be suprised if 30kpa/s worked very well, considering that I had problems with that and typical threshold is usually 60-80 kpa/s. But hey- if it works, it works... right?