I crashed my Corona 120 EP and bent my tail boom. On helihobby.com theres two versions of the tail boom the "short version" for 8.99 and the "long version" for 9.99. Do I want the short or long for my Corona 120? Or does it not make a difference?

The blades on a 120 are longer, then the nitro version. You'll need the long tail boom. Good luck.

Thanks Randy, and if I were to get a Carbon Fiber tail boom from helihobby, and I got the completly hollow one all I could use the current tail boom inserts right?

If it's the Ballistic Technology one, then there is no need for bushings. I know they sell Matt's stuff, but I'm not sure if they sell his CF boom. Good luck.

not without work. the ID of CF tube is smaller than aluminum boom by .050" matt's boom comes with its own delrin bearing. I would go with belt drive before I go with CF boom anyway. that way you can use any boom...