Just wanted to update - we processed the two CX yesterday. I ended up buying a single cone. Put up a screw hook that is permanent and slipped the cone onto it. That way it’s not permanent, and the hook can be used for other things. Wrapped some wire around the cone and post so the cone didn’t swing (the cone only had a single hole to hang). Put bucket underneath. Seemed to work! Only thing different would be to put something against the post itself because some blood ran down it, and a wider bucket underneath.
EDIT: and sorry, didn’t even think to take a pic