Hi @cchapman3 you did great studies, any study attempt is much better as doing nothing, it's just I would study this pose a bit differently. First, colour codes: blue - perspective red - "stiff" box grey - landmarks cyan - "flexible" box In such a study I would: 1. find the horizont line  (the viewer's eye level - for me its the model's head) 2. mark the perspective lines (which can be different for the model different parts) 3. identify landmarks 4. find/mark the pelvic box (in perspective) 5. find/mark the ribcage box (in perspective) 6. last but not least I would find the chepaest and the best model in the world and ask her/him to pose like the reference. The Robo Bean Model is great, but for me not quite intuitive, either for the "stiff" or "flexible" boxes, as for example I see the top pelvic line (pink) and the lower ribcage line (pink) in parallel, but when I see a few drawn examples (in the Robo Bean section of the Proko course), I find there also twists.  When I want to double check/ see how they really change (pink lines) when twisting the ribcage, I ask my model to pose and see where they are. They stay rather more less parallel. For me more intuitive approach is the egg-shaped ribcage on which arm position is flexible on both sides.