If your goal is to use up soap you don’t really like or just use up soap in general I would actually recommend the Zenith 508A boar. If it’s as nice as my other Zenith boar brushes when fully broke in it will be a great brush. It’s just HUGE.Something I'll have to keep in mind, I like the idea of using more soap. If it's enough it might widdle my supply down to one lifetimes worth!
My other Zeniths didn’t seem to take any time to break in and the 508A seems to be taking its sweet time.