Foci & Astral Projection, Does it work? Options

[Lilt]

If I had a sustaining focus that was sustaining an Increase Charisma spell, then astrally projected, what happens?

Do I keep the effect of the spell?
or
Do I lose the effect of the spell?

If I lose the effect of the spell:
Does the effect return once I get back to my meatbod?
or
Does the focus deactivate and I need to cast the spell again?

I think it primarily depends on wether you can take the astral form of any foci (not only weapon foci) with you when you project, it also depends on wether you only cast the spell on your physical body or your astral body. Similar questions could be asked about taking the astral forms of other foci such as Power and Specific Spell foci with you when you project.