I've got a really odd problem with a joint set up_ I've never had before. The joint in question is a fairly complicated join between two sections of an organic model. I've had to use spherical falloff zones in the x/y and z rotations. 'bend' is checked in both body parts. I've basically copy/pasted the parameters for the inner and outer MAT spheres so that the setup of these is the same for x/y/z rotation (so facets included/excluded should be the same) The Y & Z rotations work fine and the joint bends smoothly as expected. However on applying X rotation the seam comes apart as tho not welded (although it obviously is for the other two parameters). Ive tried all sorts of variations and adjustments to the fall-off zones without success. Has anyone ever experienced this? Is there a solution or will I need to rebuild the bone structure from scratch again? Thanks in anticipation Nigel