I've used a Kent BK8 (26mm) in conjunction with the Proraso Green Tub and it works fine, I invert the tub, push the tips of the brush into the soap and twist the brush til there's enough soap on the brush. I work up the lather in a bowl. I reckon you could happily do this with the BK12 (32mm).
[SIZE="1"]Ah... You can't beat the cold steel and the badger. All this electrical rubbish, little wheels spinning around all over the place for callow youths and peach fluff, Not for a man's beard. Razor blades for men! I think we'll have this on number 9. If you're going to have a shave have a close one!
Tony Hancock, The Bedsitter, 1961.[/SIZE]