Hi all! Off and on lurking for several years. Had MAJOR furball issues to work out stalling my practice but I seem to definitely be moving forward which is indirectly why I am posting here--what finally got me unstuck seems very relevant to your question, canuck. So here comes $0.02 from a rookie....

There are two parts to KMSO practice and what I have recently learned is that, for me at least, the relaxed, valley breathing between KS is equally important as the sound itself. If there are any blockages or furballs etc this is where they are addressed in a sort of Taoist, active/nonactive way. I have found a million and one ways to obstruct natural breathing, many very subtle and not a one of them helpful or beneficial. They are all old habit patterns that assert themselves under stress. So far at least, I have found that by just relaxing as much as possible and paying exquisite attention to whatever sensations and feelings are present and then allowing whatever process happens to happen, things sort themselves out and new energy moves in new ways.

Definitely whatever works is good.

I have found doing less and less is the best for me. When I find I am getting stuck, either energy build up somewhere or going in a loop of some sort, letting go of all "doing" other than paying attention and letting go/relaxing very soon starts things moving and shifting again. Once that happens a key sound, often even without any touch generally ramps things waaaaaaay up almost instantly.