I have a question regarding installing a chandelier light fixture in my apartment. The light fixture I bought came with a standard crossbar and I originally screwed it flush into the junction box. However, in doing so, the crossbar became too deep and the I couldn't attach the canopy. To remedy this issue, I basically unscrewed the crossbar about halfway to accommodate the depth so that the canopy would screw tight. My question is if this is safe...does the crossbar need to be tightly attached to the junction box or can it be tightened halfway as I'm describing? I pulled on the crossbar lightly to see if it would hold and it seemed to be fine, but I want to be sure this is safe.