Smartech Aero-hawk blues - this may just be my newbie skills (or lack there of) but I suspect there may be something else going on here. Check out this video that shows the problem.

The characteristic is that it will start to hover then oscillates wildly until I of course I have to set it back down.  No amount of tweaking I do seems to remedy this problem, but I've not started to adjust the settings on the electronics. 

If you have any clues as to what I should look at, replace or tweak please shoot me a line. (jamie at dph.com) 

History (and things I've tried) 

• I know how to fly R/C airplanes (cars and boats) so I'm not a stranger to controlling other types of remote machines.  
• I've practiced on my flight simulator (Dave Brown) - but it does not offer a FP helicopter so I'm not convinced it is as useful as it could be. 
• I've broken a few blades along the way, but the current ones are fresh and since I've added the training balls, I've saved on blades. :)
• I've made sure the blades are balanced as best as I can - there is some vibration but it doesn't seem too severe (but I lack a lot of experience here)
• The anti-rotation bars broke at one point  but I fixed them with some graphite rod I have. 
• This oscillation problem occurs with or without the training gear and has been present for a while now - I can't recall when it started.
• I've tried reducing the throw on the control arms
• I've moved the battery around to change the balance

Modifications done so far

• CNC Shaft collar (my own)
• Adjustable control rods (my own)
• one way clutch main drive gear www.helihobby.com

Modifications on order

• Aluminum Anti-Rotation arm (the current one is a repaired / non-stock unit)
• Swashplate ball insert

Click on picture for larger view - I've included these pictures in case it offers some clues as to what's going on.