I recently put a 22mm F2 from TGN into a vintage red and white handled Rubberset which I've been using this week. I put about 1/4" extra filler in the handle when I installed the knot so that it would stand a little higher. At this point, I have used it only with creams, and a small dab has been producing enough lather for a good 2 or 3 pass shave. I have another old Rubberset, which I did with a TGN "best" (if I remember correctly) and no extra filler in the handle. It is a bit stiffer, and requires more work to lather, but is OK with both soaps and creams ... though I prefer the red and white, especially with the creams.