This solution allows you to mount 100mm half ball on Filmcart Smartone. 1/4"-20 Screw hole and 3/8"-16 hole placed on bowl allows you to screw additional accessories.
Cin the box:
1x Bowl 100mm
1x Paddle
2x Handles long 280mm
1x Steel pipe 660mm long (diameter 35mm)
2x Screws