I look forward to the responses. I just got an Alpha T-400 with two ferrules I need to fill with knots. I've already decided on a Declaration B6 for one of them, and already have a beautiful Shavemac two-band silver tip in a Rudy Vey LE horn/jade brush. So I need one more suggestion. Do Paladin, Brad Sears, M&F, Elite, etc. install knots in buyer-provided handles?