had my A7 for a while now and actually I am pretty impressed with the A7 and A6, just not the A7 mini and A6S ERA looking dripper, which I thought should have a top side air hole vs bottom air feed. But back to the A7 it performs really good with the deep well being a bonus. Anyone reading this who hasn't seen one here is an A7 article, but now I keep hearing about, or seeing rather A7 oid that I guess mimics the spheroid? I would imagine it is something I would have to create on my own but I guess what I am after is what is the tube and where does it come from, and then how is it attached? Sorry if this has already been asked before, if anyone can shine some light on this I would appreciate it though.