I have one of Huang's 552 replicas
1) Very crisp and clear reticule, but is easily washed out by bright light sources or sunlight.
2) On the brightest setting, I can see a faint ghost. It's more noticeable on green than red. At medium settings (where you'll likely use the sight), there's no ghosting.
3) No experience there, but that info would be specific to the 553. I hear it lines up perfectly.
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