Hey how's it going? Basically my cheap aliminium grinder is killing me, it's a bitch to grind and the results are poor. So I am going to treat myself to a 2 piece space case, there are a few options to choose from like size: I am thinking of getting a medium or small, large is too big! And last of all which type do I get the aluminium one or the titanium!? Please do not try to persuade me to get a 4 piece because I want a 2, I just want to know about the size and the type. Thanks