Which sca3902 adapter is everyone using, the one made by hasselblad or metz ? They both look identical, from the same factory, probably just different packaging and price. Guess it does not matter which one if I'm going to use a metz shoe mount flash. Id like to know what you are using on your h1, shoe mount or hammerhead ? Hopefully I will be moving to a digital back if something less expensive comes from photokina. All this talk about digital repeatability for studio flash heads does not seem to apply to camera mount units ? or does it ? It seems to not be a concern as no manufacturers of on camera units is talking about it. Perhaps it only applies to the medium format digital back studio world. Perhaps not noticable or worthy of the 6,8,10Mp dslr's. Any comments appreciated.