I have a 19 guitar collection. I have had 3 issues. Solved #1....Ibanez S relay would not fit......my solution, a minor sanding of opening with a Dremel tool and filled the color with a matching magic marker in blue. You don't notice the mod. #2- Michael Kelly hydride will play through he hum buckers, but the piezo acoustic pick up has no sound. Any ideas as to why? #3- Ovation Koa topped acoustic. While it is not an expensive model it sounds awesome plugged in, but when I try the G10 I get sound for about 10 seconds, a loud pop, and then a awful squeal that will not quit. I love that guitar, but it's strange what happens.The model # is gone (sticker lost a while back) but it is not a high end model, but it sure sounds like one. The electronics are the standard Ovation brand. I would like to get the 2 guitars to work......any suggestions?