I have a Martin D-35, about an 84 model or year. I'm on a tight budget. I'm thinking about putting an in hole pickup on it. It's a family heirloom, passed to me and intended to be passed on by me. So, I don't want to do much" modding". Plus, I'm not the level of luthier to do much anyway. GFS has a sound hole pickup that matches to an endpin jack they sell. Supposed to require no cutting. So, has anyone used GFS sound hole pickups? Are they decent? Is there something similar that is better and budget priced? I don't want the wire to hang outside of the guitar as I will occasionally gig with it. Thanks in advance for any help you folks can give me.