I installed a new Tusq saddle in my Yamaha SCF08 plywood dread yesterday. The original was plastic. After doing a little sanding I got a perfect fit and height. The material was easy to work with.
The first thing I noticed is the sustain has improved and the tone is a little different in a good way. Much more string balance overall and the plain treble strings sound better. The plastic saddle made the tone harsh but now with a Tusq saddle it's smooth with more resonance. It even seems to play better.
For $12 and about an hour of my time this was a worthy upgrade!