Hi again. To answer did I notice any gains from doing this, as I had to do as soon as I fitted the RSE head & set the squish clearance, I didnt have a base line sortta thing to compare to. I can tell u that I have absolutely no performance problems arising from a side gapped plug, it fires instantly when starting, even when I was using the RSE pull start I had fitted, tho that didnt last all that long with the stiff compression. I got sick of replacing broken cords. I have also tried cutting the faces of the center & side electrodes at an angle by cutting with a small cutoff wheel on a dremell. I found that a fine cutoff wheel would gap the plug at almost exactly 0.7mm if I did it carefully. I've done this on the last 2 plugs as I found it easiest to cut the side electrode enough that I could squash it down toalmost the height of the center electrode, then gap it in that manner, tho the angle is quite a bit more than 45# so that the spark is open to the chamber. Cheers