If anyone is interested, I took the plunge on the Sirui L10. With a bit of patience I was able to get the clamp off the head. Rather than Loctite, it appears they have used some type of epoxy to secure the mounting screw so it requires a little more time and patience with a soldering iron to sufficiently melt the glue to remove the screw. Sirui clearly don't want you removing the clamp. The screw is 5/16".
The mounting plate has a pair of small (3x2mm) anti twist flanges. Sirui's L10 clamp only has a single pair (opposed to cross sectional) of anti twist grooves. What does this mean? You can't reposition the clamp on the head. Accordingly, if you're using a camera body plate, you only get movement from left and right, not vertical up and down. I would imagine vertical movement is the main reason why anyone would buy a monopod head. Along with the epoxying of the screw, this is a design oversight which is also complained about on Amazon reviews. Of course it is less of a problem if you are mounting via a lens collar as the head will function vertically which is it's intended purpose on a monopod.
Anyway, here's a couple of pics with the clamp off:
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Having said the above, the Sirui is well finished and looks and feels solid. I haven't had a chance to test it but would imagine it wouldn't have a much of a problem with any of my rigs, 5 to 6kg max. Definitely worthwhile to consider for those looking for something more than the ubiquitous manfrotto head but who feel the more expensive offerings are overkill for their needs. And while the Sirui clamp doesn't have a cross pattern anti twist grooves the clamp itself is quite nice and clamps solidly to my RRS plates. I have the screw clamp FYI. I can't comment on Sirui's lever clamps so you need to be mindful of mixing lever clamps and plates from different manufacturers even if they are listed as arca swiss.
7D and lenses.