Tamas,
I used Hasselblad to Olympus OM rings.
Using Hasselblad lenses on 35 mm format might seem like a fun idea, but it isn't. There is no reason to carry too large and too heavy lenses, when you have perfectly good 35 mm format lenses. The limiting factor is the format, not the quality of lenses. (And no: 35 mm lenses are not better than MF format lenses).
You could carry a 35 mm format body, with adapter, in your MF kit bag, but again, what's the point?
Anyway, i used a Zörkendorfer ring, which needs a generic T2-adapter to mount it on the 35 mm format camera of your choice.
The Zörkendorfer ring needed additional maching, to make the Hasselblad lenses mount smoothly. It was much too tight the way it came from Zörkendorfer.
The lens release catch of the Zörkendorfer ring is a small bent bit of metal, with sharp and rough edges. A pain to use, literally.
And i used a Novoflex ring too. It needs a fitting Novoflex adapter to mount it on the 35 mm format camera of choice. The Novoflex is much better made.
Both as i mentioned: there is no good reason to use these thingies.
Use Hasselblad lenses on Hasselblad cameras, and enjoy the benefits of the format.
Use 35 mm format lenses on 35 mm format cameras, and enjoy the benefits (size, weight) of these thingies.