Summoning a demon implies you're going to be doing this for a working, in which I would avoid doing it at a VoC. Start the working, petition or request at a later date. Large projects I would avoid in a VoC. :idea:
The Moon was waxing in Libra and Cancer just days ago, and as I write this post the Moon is on its anaretic degree. If you were doing it for love, just do it some other time now that it's waning. It will also give you a time to cool your head and to approach things rationally. Best of luck x