print 8x one of the ball files 1x ball bottom file and 1x ball cap file and glue the the ball parts on the bottom and cap. We used a 3d-pen to fuse it together.
printer settings:
ball cap file and cap file
set outline /shells on 2 no infill no support
turn the files so that you can print a bottom and no top.
all other files you can just print it how you want.