I’ve had a lot more success with the half butterfly sweep than with any of the variations that Lachlan Giles describes below. I’m also pretty complacent about my opponent grabbing the kimura grip as I pass their half guard on top. Lachlan Giles is a high level competitor though, so my differences in this position suggest I need to study it deeper. I regularly hit the arm bar that he says he used to fear but should never happen.