Tail Vibration

[Revster]

Does anyone else get more tail vibration from a extended boom then a stock boom, I had this problem with a extended boom I made, so I thought I did something wrong, so I bought a new Blade extended same thing, sometimes its fine and then at times will will get a bad vibration, put stock boom on no problems. All booms fit tight and everything else checks out ok, as far as I can tell, any ideas?
Thanks

[phoenixheli]

I get some vibrations with the stock boom later in the flight and after I put more packs through. The head on these things aren't exactly the most precise. Usually when there is a fair amount of wind, I get some heavy vibes or with hard collective. I'll have to see if letting the heli cool down between flights will help or not.

[SplashN'Crash]

I switched the main blades from one side to the other. The slight vibration I had was gone. This was a common thing to do on RC hydroplanes too.

Sometimes this helps, sometimes not.

Garry