Thanks for reply Pope, I did not find the mark II and III sl dt mono scrubbed very well, though the new one may be better. I also want a brush I could use on leaded windows so will probably use a sl flocked.
For most of my work I use the soft dt sill brush on a clx22 with cold water, the other brush will go on a clx27.
I also sometimes use a vikan on a 17ft xtel (probably will switch it to another clx22).
It seems to much hassle to change a brush on a pole.