Hello everyone, just acquired an old Rubberset 400-4 that I wanted to try an original type knot it. I was able to find the below information on the original Rubberset and that it took a long Boar Knot at 24mm. Does anyone know where I can purchase a 24mm knot that is closest to the original knot used in this model? I have the Alpha- T with badger knots already, so wanted to try the original this time and put togethers something as close to OEM as possible. Any assistance or additional background on the brush or knot would be appreciated.
"There were three versions of the brush: the 400-3, 400-4, and an unnumbered brush. All brushes required a 24 mm diameter knot. The 3 or 4 indicator represents the length of the original boar knot with the 4 being slightly longer than the 3 and the unnumbered version being in the middle (at least from my observation of owning all 3 at one time)."
"There were three versions of the brush: the 400-3, 400-4, and an unnumbered brush. All brushes required a 24 mm diameter knot. The 3 or 4 indicator represents the length of the original boar knot with the 4 being slightly longer than the 3 and the unnumbered version being in the middle (at least from my observation of owning all 3 at one time)."