I've been using this Semogue 820S boar brush a lot for the past 4.5 years. Firstly, this didn't have much backbone like other boar brushes to start with, say Semogue 620S. But it was super easy to break in and started producing great leather much quicker than any boar brush I've used so far. However it has splayed out a lot. I tried banding it together and that didn't help. Basically the center part has no stiffness and the brush now feels softer than even synthetics and badger hair brushes. I am wondering if it's done and must be discarded. Need some advice on this. I am attaching the top view and side view of the brush in it's current state.