i know rms0504 and i'm confident of his math and his mechanical engineering chops. as far as i'm concerned he's providing science and fact. not marketing bs.
i've called out other vendors for their claims (including pangolin). we need fact checking. we need to keep vendors honest. all of them. beam clipping may not matter to some, but it does matter to me and is absolutely something i would take into account when buying a set of galvos.
jian's updated galvos look worthy and i have totally abused my set of dt40w's and they're still going strong after many years. i wish him great success as his galvos are the best i've seen come out of china.
suppose you're thinkin' about a plate o' shrimp. Suddenly someone'll say, like, plate, or shrimp, or plate o' shrimp out of the blue, no explanation. No point in lookin' for one, either. It's all part of a cosmic unconciousness.