I've seen where other full system reviewers struggle, but this is TOTALLY compatible with Arca/Swiss. I use them with Vanguard tripods and both the base and quick release plate fit perfectly. I bought a few complete sets direct from Ulanzi, a base and a QR plate, and then additional QR plates once I realized how well they work. My only criticism of them so far is that they're a little pricey for what they are.
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