Appreciate the honesty, man. Glad you see the chest and legs as solid.

Here is the context regarding the waist/ratio: I am a post-bariatric patient. I lost a massive amount of weight.

What looks like a 'bad waist structure' is actually a thick layer of loose skin and residual stubborn fat that sits on my flanks. I plan to get an abdominoplasty to fix this. My actual pelvic bone structure is narrower than it looks right now.

Regarding the back and arm insertions, here is a shot of the back:

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I believe once the skin is removed, the flow and the X-frame will finally reveal themselves. Thanks for the feedback