they only different with Scaled size as well they had same mesh counts per parts. For example : if Set 22's first one is 100% then second's 102, then next one another 102% as they climb up size by change offest scale untill Set 24 then 98%..
Structue explain image is on next to pictures before parts preview. i hope it help you to understand how this snake consist of it
i guess instruction still not clearly enoght but i i have no idea how to fill them more;