Discovered new head P0 from Arca-Swiss. Looks to be suitable for small tripods such as Series 2 Arca legs. I may spring for a couple of these since I need something for Series 2 as well as for a Manfrotto 190CXPRO4. My Z1 head is to big. I use it on Series 3 legs and it performs great.
See links below:
http://www.precisioncameraworks.com/Media/p0-eng-web.pdf
http://www.arca-shop.de/Monoballs/Monoball-p0:::115_178.html
