Satoshi Kamiya Loggerhead Sea Turtle
50 cm foil from origami-shop
diagrams in tanteidan convention #16
do yourselves a favor when you try this model, and do at least 40-50 cm. i made multiple attempts at 35 cm, and while certainly it is possible, the pleats you form circa step 70 are very stressful on the paper. larger sheets will tear less (this is if you're like me, and nicolas terry foil is the strongest, thinnest paper you've got--japanese foil is too too weak). another huge favor you can do for yourself is precrease steps 70-77 on ALL the relevant pleats before proceeding. once you collapse the creases, this locks the affected pleat in place, and the model won't lie flat for you to precrease the remaining pleats neatly if you do them sequentially. another favor you can do for yourself is precrease step 86 before collapsing any of the pleats.