Wow those brushes look great, loads of life in them (turn them upside down).
I bin mine when they look like Freddie Boswell!
Xtreme stiff for me (behave yourselves) I got bad elbows, not my fault!
However:
I got myself the new Gardiners Supreme soft flocked. This is one seriously good brush. A fraction heavier than the Ultimate, but this thing glides over the glass and eats 'leaded' for breakfast.
Thank you Alex.
P.S. Looking forward to your new Xtreme sill brush...?