I just got back from holidays where I used my Shen Hao 4x5 for the first time and it was very easy to set up. There was a real problem with focussing because the gg is soooo dark. I'm going to get a new one from Dave at Satin Snow as soon as I can. In the mean time I have taken the gg from my Nagaoka and put it on the Shen. I did find out that the Nagaoka had a fresnel lens as well. Apart from that the Shen is a delight to use, and I'm looking forward to using it again.
Mike