I agree on the leg seeming a bit off, and the arm was a struggle to get this far in the end.
At some point I changed the curvature of the upper leg, which makes it point (seemingly?) at somewhere higher than it should. I have to be careful with the contrast though, the overall is the most important.
I ran over the process you suggested a few times. Funny I always start poses in my minds eye that way too. the origin of all energy in the body, or attenuation point can always be traced back to the lower spine and pelvis. 
At some point I simply lost track. Thanks! 





I can’t stop my hand from moving the friggin pen!!!



