Fan Mount Clamps and Filament Guide

I designed these parts for my Wersybot: http://www.thingiverse.com/thing:37009
Anyway, you can use them in a lot of variations on other printers as well and for all fans with holes for M3. To fasten the clamp it needs only to drill screw holes M3 into a part. My Wersybot of course has a lot of them ;-)
As the photograph shows, even one screw is enough to fasten it to an x-end and you can align it as you want.
I see an advantage to fasten the filament guide onto the base. This way there ca