the shell of yoshi ok, i have to say this don't underestimate this piece it is not hard but a bit complex (yeah i write it again in that way when i have allready released the sheets )
specially when the sides turn from "valley" to "mountain" and the opposite
start it at the center and build outwards i splitet the large single rings into half (you will see it) but i prefere to not connect them back together to a full ring assemble one side, then the other, then the next half ring and the other side there are a lot of hard edges and even i changed the most tabs you may have to cut them a bit on your own too
p.s. i don't know yet if this is working the plan was to build this seperated and just glue it on the back of yoshi