My duo partner just got a very articulate Martin OO-18. We are looking at pickup systems for it - Prefer a single source pickup that is not an under saddle piezo strip (unless you have one that really sounds great). It could be a soundhole or an internal pup. Need to access controls in soundhole (will not cut or drill big holes in the guitar). The only non-reversable mod could be an endpin jack. Willing to use and outboard preamp/EQ if necessary. What do you think?