I was looking at the Kirt and the RRS site for a tilt head that uses the manfrotto tilt head with their clamp but they don't have them any longer. They have the new design that looks awesome but for $260 plus I just can't do it. So I looked around and found the Sirui L-10 works like the RRS and Kirt tilts at more than half the cost. Well I got it today and wow I am impressed very nice head, I had the Sirui monopod so I wasn't worried about it not being good.
I was looking at that model as well. Are you able to separate the clamp part from the actual tilt portion? For example, I want to be able to replace the clamp with a Kirk or rrs version or perhaps reorient the clamp by rotating it 90 degrees.
Although I already have a RRS monopod head which IMHO is really the Ferrari of monopod heads, I needed a smaller one for another use. Initially I looked at the Sirui at my dealer but I didn't like the orientation of the clamp as it it came from the factory and wanted to re-orient it. My dealer and I tried to loosen the screw holding the clamp to the rest of the mount, and it was incredibly tight... probably torqued down by a machine with a lot of force. We never did get it to loosen, so I didn't buy it and instead bought the Kirk. Cheaper than the RRS but still very nicely engineered. There's a guy who sells on eBay: Hejnar Photo who makes some exceptionally well produced items in the Kirk, RRS vein and I'm pretty sure he makes a monopod head.
The RRS MH-01 head has two curved guide/clamp tracks, one on either side of the head support, while the Hejnar has one. I think the RRS symmetrical design is better, but that's not to say that there's anything wrong with the Hejnar product. I have a lot of his clamps, rails, and a 'long lens support', and they're all top quality.
The Sirui L-10 looks like a clone of the RRS MH-01. I'm glad to hear that you like it, sounds like a real bargain.
It looks like the Hejemar has one pin with three holes for different orientations. The pin does not look so robust. The price is lower on the Hejamar site.