Jim, there is another joint trick that works. You can duplicate the joint channels - as long as the name is slightly different. I had a situation at the shoulder joint where I thought I wanted a JCM to work only when the shldr bent down without the collar bending. The joint rShldr zrot. If I put both the JCJ control and the JCM control on zrot, the JCM would apply when the rCollar bent down. I duplicated rShldr zrot - gave it a different name zrotA and the dial name was "Up/DownA". I put the JCJ on zrotA and the JCM on zrot. It worked like a charm. The limits for zrot would be 0/88 and zrotA -30/20. This means that the arm can bend down 20 degrees too far, but it also means that the rShldr cannot bend up without rCollar. Turns out that the JCM played nice with rCollar bend , so it was not necessary to do the split. This technique could be useful sometime though.