This is one problem we have had here on B&B as well. When a brush project is discussed publicly in the forum, in regards to shape, material and knot, then there is never an outcome. It was tried a few times in the past, but all those projects fizzled away...100 guys, 100 opinions on what is should be. All other brush projects I was involved in, and there were quite a few (incl 3 LE's) were discussed in a small group and then the project was presented to the group. This is the only way it works for a forum brush.The problem with the TSN LE M6 Manchurian is that every Tom, Dick, & Harry on that site offered input into how the knots should be lofted and Simpsons listened to them rather than doing what they know how to do much better than some punter on a discussion board. It was ridiculous. As a result the knots weren't what they should have been. I have an M6 LE Manchurian from 2020 and it is an outstanding little brush.
BTW, my TSN M6 is great, 22 knot at 45/46 loft.