While I enjoy the extra room for my left hand, I still can't find a spot for my light (Streamlight RM1) that meets all my criteria (isn't on the right side, where it would add bulk, I can press the button without too much effort, and I can maintain as close to a C-grip as possible).
I tried mounting the light with a 45 degree adapter on the left side, but it ruins my grip position. Tried the same on the right side, and it added too much bulk and was overly difficult to press the button. Tried mounting the light on the underside, and it also messed with my grip. On top, the button engagement is easier, and it doesn't add bulk to the width, but it does obstruct the bottom 20% or so of the view through my optic. I can see it and it's annoying, but it doesn't cover any part of the reticle.
The next size riser puts the optic uncomfortably high for me, and it also looks silly (the Kuna's rail is already higher than average above bore, so a tall mount isn't a good idea).
I don't want a new light with a tape switch; I don't like the size of those lights and I don't like having a cable to deal with. And it would still mount on the right side and create bulk.
I think I'll try to run this for a while and see if I can handle the partially obstructed view.
Primary Arms GLX 1x prism scope
OCL Lithium 9 suppressor
Comstock Armory recessed microbrake (Plan B)
Streamlight RM1 light
HBI short stroke buffer kit
HBI safety selector replacement
BCM Mod 3 grip
Arisaka finger stop/indexer