I normally would use a safety pin for a quick converter for the back of my bra with my cosplay costumes....until the day my safety pin came undone and stabbed me in the back(literally). So time for a new solution. And I can print these bra converters in any color to match whatever cosplay costume I'm wearing!
Make easy metal pieces from your 3D Printed molds. I designed my model in Fusion360 and 3D Printed it the 2 part mold in resin on my Form2.
There be dragons...well dragon 3D-printed spikes on fabric...close enough.