I own a few of each and one Stingray X, all clones. Perhaps because I'm more handy, my hobbies requiring me to own and use small tools and a Dremel motor tool but a few minutes grinding, sanding then polishing produced switches with at least completely acceptable action, some just OK, others very nice. Only the Stingray X didn't require more than the standard cleaning of a new mod and light lubrication. I have no issues with the Nemesis switch adjustment and action compared to the Stingray. I did add magnets to all my Nemeses.
The one nice feature of the Stingray X is that you get the conductivity of copper but the wear of stainless steel with its copper tube welded inside a steel tub design. It also comes with a semi-hybrid adapter which makes it 49mm long in 18350 mode, the same as the 4nine. So perhaps the Stingray X as an option. I paid $38 for it domestically from focalecig. You can get almost one Nemesis and one Stingray from China for that price, perhaps $5 more.
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