Looking at the pictures and describing drilling etc may put some people off trying fans. I got a brush fitted with fans about 6 months ago, i loved them. (yeah, Gardiners) so on my next order i got two types of fans, clear ones and wide red ones ? To change my brushes with pencils jets in over to fans all i did was knock the brass pencil jets out with a pointy screw driver and push the fans in with my thumbs and they're fine. Unless i'm missing something there's no need for allsorts of drilling and JG fittings?