Will be ordering my new slx-25 next week, and wanted to get a sill brush with it. At moment I use Gardiners dual trim medium mixed bristle brush...and it's perfect for me. Medium on outside, stiff bristles in the centre. BUT...they don't do the same in a sill brush (I've emailed alex to ask if he has any plans to make these). So- I can get a dual trim medium- but I think this might be a tad too soft without the stiffer inner bristles. Or I can get a single trim stiff- but don't really want a single trim! Anyone used these brushes and can advise me on how they perform? Just wish they did a mixed bristle sill brush!