I want to start stocking up on some extreme spares. I see there is an aluminum tail boom for this machine. Is there any negative effect of using this boom vs the carbon boom? Also anyone have a current part number for the clutch assy. The number I have in the manual says discontinued.

Ron Lund has the carbon fiber booms. They say "Hatori" on the side, but they are the same as the MinAir booms.

Avant RC
Scorpion Power Systems
Thunder Power RC
Kontronik Drives

When I had my extreme, my preference was the carbon over the aluminum. Reason being - on a less than perfect auto Ive put a slight bend in the aluminum one. It was not a bad auto either - Id admit if it was a crappy one. But Ive had it happen to 2 booms so after that I switched back to the carbon fiber. Plus it looks cool...