Here you go! Out of the kindness of my heart I handmade a FREE PRINTABLE TEMPLATE AND INTSTRUCTIONS FOR 3D MANEUVER GEAR! It is just the back piece but I will do more tutorials and templates when I am not BROKE because that took me several hours to make.
If some people buy commissions of the gear from me (send an ask if you are interested) I will make tutorials for the other parts of the gear and stuff (maybe even costume pattern if I make enough money).
I did all of the math for you (stay in school kids, one day you will need that calculus and geometry homework) so it should be pretty easy, but if you have questions or a problem or just want to pay me to do it for you, send me an ask.