The question about furler for Asymmetric and Code 0 has been raised in this thread.
I have a Facnor FX2500 with a AFX kit so I can use the same furler for both the Asymmetric and the Code 0.
This is the tack of my Code 0, the bowsprit is in it short position, also notice the bobstay (adjustable) to deal with the extra load of the Code 0
This is the Asymetric on the furler with the AFX (the torsion stiff rope is the black rope going from the furler.
In this picture the tack is eased to get the luff to windward because we sail almost DDW.
The tack has to be hauled in before furling
The Facnor system use a central furling line attached half way up the luff going to the torsion stiff rope. I have no experience with the top down furler - but I will try next summer (I only have to disable the top swivel with a dyneema lashing to convert)
In this picture the have use the spinnaker boom and a afterguy to get the sail to windward - less wind than i the previous picture so that helped fill the sail.