Have an exploded assembly view that consists of a cylindrical water tank with 3 bands spot welded around the circumferance. 2 of the bands are the same, the third is a configuration of the other 2. The parts show up OK in the BOM but when I want to ballon the configuration the ballon number is the same as the other 2. Balloning works OK in my standard un-exploded assembly. Any ideas? Steve R