ORIGINAL: ƍ
True, there probably is no real benefit in having all the servo arms absolutely level. But it does look nicer! I'm currently doing an entire frame replacement and decided to go through the entire process of checking out each and every part/assembly. I didn't break my frame in a crash, but I didn't like the condition it was in when it came out of the box RTF (brand new) Like the old saying "If you want anything done right you have to do it yourself". When my LHS gets some of the aluminum swash plates I'm going to install one of them also.
Anyway, I get personal satisfaction from a job well done, plus there is the added benefit of having gained experience setting up and adjusting this helicopter. That is why I'm going to do the DD tail replacement. Just so I can experience it for myself. If I don'tlike it, I'll convert it back to original.
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You can put the link in one of the other holes to center it. My servo arm wouldn't center because it ended up between two teeth, however by moving the link to the top hole on the arm the link is centered.
When you install the alum swash, check the links for movement. The balls are a little oversize and you need to squeeze the links like bdavison recommends about 8 pages back. And yes the swash is well worth the upgrade. So much smoother than the stock one. (the DD TR is worth it too)