My concern was with there being no locknut which I'm used to using when installing sink drains as it helps create very tight seal. Here is a picture of what I'm talking about:

And here is an image of my MR Direct install. I used plumbers putty instead of the white foam washer, but ended up only being able to hand tighten the strainer and drain to the sink because there was no locknut (also attached as "myinstalljpeg"):

I did notice that in images of this strainer basket on your website, it shows a part that looks like a locknut, but I never received that part. Was my drain supposed to come with that piece that looks like a locknut? It looks like that piece could be tightened with a wrench to do a better job over hand tightening. Here is the image on the website I'm referring to (also attached as "strainerimagewebsite"):

So, perhaps I'm just missing that piece? I hope this information with images helps, but please let me know if you have any questions or need further detail on anything.