5.5 Head speed question and tail rod suggestion

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What are you all running for head speeds on you 5.5? I had my medium head speed set to 2400 RPM and noticed major vibration in my tail, but it completely smooths out at 2600. I'm curious if 2400 is just hitting the resonant frequency of the heli.

I'm also curious about what 5.5 owners feel about the design of the tail push-rod and push-rod guide. I'm not a fan of it at all because it has to be slightly loose to reduce drag and that causes vibration. I hope KDS fixes this and releases an upgrade that we can purchase that is maybe more like the tail rod assembly on the newer Align 550 that has the metal sleeve where it goes through the rod guide. One of the 5.5s at the field this past weekend actually had a goof amount of carbon worn away from his tail rod from it shaking in the rod guide.

Does anyone know if the Align rod will fit the 5.5? I know the rod guide will be to small for the 5.5 boom, but I'm curious if the rod length is the same.

[BorgeBorge]

It's got the same boom diameter as the Logo 600 and KDS Innova 600.

Maye look for upgrade tail pushrod guids for those.