I just wanna try to solve the challenge from Erik : "Magnet enclosing balls"I design this in Autocad and make views from Openscad.(i didn't design this with openscad because i don't know how to.... ;-p )The 2 half spheres must be glued or redesign to fit in correctly.The cross come in the ring, small shafts are for magnets, the ring must fit in the sphere...I designed this in some hours, i need to arrange some details.. :-)EDIT Sat 07-26: Crossing shafts and 1/2 sphère modified and update