I've had a Yamaha LL11 for the last 20 years. It's always had the stock plastic pins. The other day, I came across a thread here and a comment about brass pins. It never occurred to me that pins could make a difference. I always thought that the saddle and nut are the important contact points. After some internet digging around, I came across a lot of contradictory information - surprise surprise! So, I thought I'd try changing them and seeing for myself. I just switched the plastic pins for ebony pins. Well... it was the cheapest substantial upgrade I've done on a guitar. I didn't think I'd hear a difference, but I most certainly did. The guitar has more 'body' and the treble sounds tamer. I suspect the difference is that the pins force a better contact between the strings and the bridge. Not sure. But the difference is certainly there and it's a good one. So... thanks tdpri!!