Did this a while back, it was my first brush fix. Rubberset 49-5 No finish left on it. Got a 27mm boar from TGN. Took the plastic thing off. This knot doesn't have much of a glue bump, so it was a bit sloppy. So I made a tapered ring to fill the void. Not glued yet, just sitting in place. The handle has several coats of TotalBoat Teak Oil. Here it is now after months of use, holding up well I think.