About this 3D model

The Threaded Filament Dust Filter (for dust and adding oil) was made by http://www.thingiverse.com/thing:153807 I saw someone added a knurl in a remix, At the time it didn't include the files but they do now. http://www.thingiverse.com/thing:258598 Theirs has a knurl that makes the filter wider. I need mine to fit in a smaller area, and it is not important enough for a dual color print. So my knurl is recessed. In version 1 Version 1 didn't print as the knurl was too small. So I made a dual color printable wide knurl version just now. I did add a knurl to the male part too, so I added another few files for individual and dual set parts. Sorry these are BIG stl files.