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Old 05-21-2008, 01:01 PM   #63 (permalink)
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My HF Map location
Join Date: Nov 2005

Originally Posted by toaster12 View Post
Splines, I believe he is referring to the torque tube ends that fit into the umbrella gears.

Probably for putting a longer boom on the 600!
I will have a look see but I am not taking my 600 apart to check.....

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