Hone Shaving is going to release the Type B. A modular shaving brush. With a mechanism It'll allow to change the knot. And to adjust the hight (5-8mm). Sizes are 24mm knot for a 31mm aluminium handle. And the total weight is 160g with the default synthetic. https://ischiapp.blogspot.com/2023/06/hone-type-b.html