Thanks for the replies
Iíve borrowed a Sinar P for a while and I love it, the only problem is that itís way to heavy.
The reason Iím concidering the Horseman is that Sinar accessories fits, and the L frame makes it Ďeasyerí to rig up/down and put in a backpack then a Sinar. But you make a good point in that its not to easy to find information about the Horseman.
Iíve concidred Arca Swiss, but the price of the model Iíve found is Ďa bití too high. Maybe Iíll consider a Sinar F2.