Reze bomb devil bomb apron
I used this file to make my dynamite apron for my Bomb Devil Reze cosplay. The slots are ~1.1in wide for 1in nylon straps to fit through. Printed at 15% with only 2 walls. You can try 10%. Supports everywhere for support setting. Then I recommend using red tpu for cosplay.
For the straps, I sewed a 1.1in slot at every section the slot on the dynamite section sits at. Then I wrapped a strap around the dynamite that goes through the slot on the long nylon strap that goes the length of the apron. The strap that goes around the dynamite velcros shut. Then I just slid a strap of nylon through the very top dynamite and tied that around my waist.