I am considering ordering some knots and glueing to handles. Since I've never done this and don't want to screw it up, I'm trying to get a sense of the skill required to get a result that will look good and work properly. My DIY skills are average at best. Thanks
Also remember that some handles have age issues that are unseen until drilling or even setting up the brush in epoxy and the stress will cause problems. So understand as Mike stated it is easier to set a knot in a clean new handle than refurbishing an old brush.