My GRP is set exactly what your Ninja liked 5 1/2 LSN 3 1/2 HSN +/- and hour or two. I find I only need small adjustments no more than 3 hrs. I have never had a flame out. My problem is I start temping low as the night goes on, 190ish, running a OS P3 plug in hot ass Arizona. I then start leaning it out to get the temp up and put her into a lean bog. I'm running that ultra hot plug to open up the tuning window, not sure my logic is the best on that, but it's been working; except for how quick I can lean bog when leaning it out.