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 can not be a bucking tranfer of the filament to the x-unit.
Fan 80 mm.stl