I am considering getting a fuji gx680 to use with my leaf aptus back. I am planning on using the very cheap Chinese adapters people have been talking about, but I would like to hear from anyone who has used it if it was successful. The main thing I am worried about is losing infinity focus, and thus having to shim or modify the viewfinder of the camera, which would be really bad in my situation. Also I hear that using the oneshot box is required for leaf aptus backs, I was also wondering if there is a way around this.