DC when you work staves like this you have to balance them to do not twist. In this case they are prone to twist on string side. You stop that by leaving string side of the limb thicker and opposite little bit thiner. And thats the rule. 😌 Please feel free to ask anything more, my explanations are not always good, english is not my language. On my seminars a lot of students are most interested in these kind a bows.
Simson, yes, I am sure this is mass.
I never mix them.
Mass has more mass (maybe its name is for that 😬) than sanguinea and less tension strength. But, it seems mass has better compression abilities.P.S. It is 10 gpp arrow on video.