This is a backpack hanger made in 2 parts. This can be printed on the A1 Mini. I made it 2 parts so if one part breaks it can be fixed by just replacing the broken half. I also made it work with other models I've made including a hat, belt, and tie hanger. The design is plenty strong to hold 10lbs. The back pack I had in the picture was probably 10-15 lbs. Hopefully this design can help you with your needs good luck.