Two ways to do it.... First, to have the sheath a smart-prop to the shoulder belt. I believe the cr2 can be saved with that relationship (saving the user from having to do it). Better, I think, is to make the sheath its own group, parented to whichever part of the belt conformer is most convenient, and turn bending off on that body part. I've used variations on the latter several times. The trick is that a conforming clothing item may contain body parts that do not match the figure beneath; giving you the opportunity to pose or otherwise adjust them manually. (If you wanted to be really, really tricky you could put some ERC channels in the sheath that let if compensate for certain poses. The problem there is you have to call on cross-talk to do it; the rotations it would need to "see" are present in the conformed-to figure, not the conforming shoulder belt.)