Customizable disposable kitchen sink strainer

I tired to clean up the strainer of the kitchen sink every week, then I designed a disposable strainer printable.
I choose OpenSCAD because it is highly parametric design.
And fortunately, it made the design customizable to fit your sinks.
2014/6/15 update:
I found that the knob for picking up was essential after use. So I added it referring http://www.thingiverse.com/thing:85416 .
Set handle_height = 0 and handle_lower_diameter = 0 if no center knob is needed.