I found the Tachihara's GG to be very good (and had a chance to compare it to other camera's like Toyo 45A, Technika, etc.., and it was in the best ones...)

I still agree that a 90/8 SA was a pain to focus though, and so was a 75/8 SA. The Fujinon 75/5.6 is WAAAAYYY easier on this regard.