RE: Extreme composite Pro-Line
I have used Great Planes 3 ¼ spinner with aluminium back planate this year. It is working find the 300 flights I have done. 200 with YS 160 DZ and 100 with OS 140 RX.
Note! Great Planes 3 ¼ spinner has 4 screws to secure the plastic spinner to the aluminium back planate. The Great Planes spinner with diameter at 3 and less does only has 2 screws.
If I remember correct the weight is around 2.3 ounce.
[link]http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXEBE9&P=SM[/link]
/Kristian