you have to define what "fit" means for you... if you have a JJF dial its better to wait for a DWO made for that specific dial. I will repeat again, if you now oder a dw from here this will fit without any mod :
BP Aquanaut
BP Nautilus
PF Nautilus
KMF Aquanaut.
I think what he means is to use the PF rep with movement that came with the PF and swap only the dial of the PF with the dial of the JJF. not use a JJF rep and dial with the DWO we are ordering. I am sure the new coming project of making a DWO to fit the JJF rep in general. but I think he means to decentralize the JJF dial to fit the DWO for PF reps.