I have a Martin D-15 that I play a lot. She's about 8-9 years old. I have a really bad habit of strumming too far towards the neck and have worn out the soundboard a bit above the pickguard (toward the neck). Nowhere near wearing all the way through, but eventually it will look like Willy Nelson's guitar. There is also wear around the sound hole. Should I get a custom pick guard installed? How much would that cost? Not something that I am interested in doing myself.