Got my PT Models carbon fiber 20x8 yesterday and flew it today. Nice looking prop, almost as light as the 3w wood 19x8 i had on the plane. I was getting 6800rpm and I didn't get a thrust measurement, but i would guess maybe picked up 1lb more. Not a big difference at all. In my up-lines the plane seems to continue to accelerate the whole time, versus a steady pull with the 19x8. The Brillelli is a little dirty, but it runs great and I'm really happy that I switched from the YS 160 to the 40GT
Al