Yeah the 100 x requires immersion oil , only really useful for bacteria but I like using it occasionally for seeing slightly more detail on other things . The lenses should be interchangeable , so you could take out the lower magnification and put in a 100 x depending on what you are viewing . <| sep |> Is there actually a hidden design or is that just the title ? Cause it definitely looks like something is hidden but I can ' t figure it out . Is that the whole point of the piece ? Did it work perfectly on me ? Am I stupid ? <| sep |> Yup , not a lot of people have heard it but I think it ' s only on her two punk style skins though . <| sep |> The T 300 RS is the one with a rubber covered Playstation branded rim . <| sep |> I imagine because of the holiday andor some approval process , it will take some time before Valve revokes the keys .