Hello, Tim, and welcome to the forum. You did not say whether your HSc is Wartime or New Model but in either case replacing the Grips is about the easiest thing you can do. There are Springs and moving parts on the left side under the Grip Panel but, with care, nothing will become dislodged when you remove the wood. Good practice is to have a screwdriver that closely fits the screws. An undersize screwdriver could cause damage to the Grip Screws.
Hope that helps. Anything else, let me know.