You shouldn't mod your zenith v2, it has a copper contact which makes it a no go for bf. We are all waiting for the Stainless steel contact, which is safer to use for bottom feeding.
Anyone want mine?
has anyone seen if the bottom feeding tube works on the clone?
Your Zenith, or your BF center post?
I haven't taken the original pin out of the clone yet to see if they are the same size but so far everything I've measured and compared seems to be 1:1 except the thickness of the negative posts. The negative posts on the clone are a little thicker because they didn't take off as much material when they were machining them. I'll report back when the time comes but as far as I can tell they are the same. AFC rings and everything else is interchangeable so far.
Sent while slacking out and about.