ok, Ill give it a go this weekend with a 2300KV motor that can handle 4S; assuming it survives, you would know you a fair safety margin. Id be a little surprised if it disintegrates, I have a FMS FW190 with a molded spinner like that, and it feels a lot more fragile. But we'll see.
Meanwhile the print finished. Small remark, the 'pins' dont fit, I dont think you left any margin in your design. You can sand it off to make it fit, but they are already relatively thin too. In your next revision, I would make them a bit thicker, longer and allow some margin. Id also consider making the spinner shell a bit thicker in case you overtighten the screw. FYI, the bottom part weighs ~28 gr (some support material to be removed yet) the spinner 12 gr.