This is the experience I had with my 517. I loved the sound with the micarta saddle, but have bone on all my other acoustics. So I decided just for the heck of it, to buy a MacNichol bone compensated saddle and give it a try. Without changing the strings, I pulled the micarta out and put the bone saddle in. My initial response was that I really missed the dry, old-timey sound I was getting from micarta, so much so that I quickly put the micarta back in, and loved the tone. About a week later, after thinking that my first assessment of the bone saddle had been hasty, I again pulled the micarta out and put the bone in. This time I definitely heard a bump up in bass and volume, with some additional clarity. After playing the bone for about a week, my ear acclimated and I really enjoyed what I was hearing. That's been about 2 years ago, and the bone saddle just sounds really good in the 517. I keep the micarta saddle in the case though, just to keep my options open. I think the 517 sounds good with either saddle.