Hi all you Trex boffins out there - a question to help a frustrated Trex'ian.

I have a Trex 450XL CDE - Love it - it was flying so smooth - was flying it one day, setting up Idle Up for the first time, when I lost Radio Control for some reason - the Motor Shut down completely (luckily) and she nosed into the ground from about 15 feet up - the only thing broken that I could see was one of the Main Blade Grips - which I then replaced - but now - I cannot get the blades tracked at all - turning the links on the longer rods - from swash to mixer arms - makes it go either too little - i.e. blade flies lower, or too much - higher. I had set up my pitch curve to 50 inh 50 inh 100 - to basically get 0 pitch at 50% throttle stick - i.e. if my throttle stick is at 50% and I switch to idle up - they both match pitch wise - as idle up goes - -10deg to 10 deg with 0 at 50%throttle stick - so now I have the blades tracking fine until the head gets up a bit of speed - i.e. about 50% - then the one blade starts to go higher.

I have also now changed to a new Main Shaft and New Spindle shaft - no difference - still does not track!!!!

This Trex tracked so well before!

Any ideas what might be wrong - what could still be causing this blade tracking differrence - could the Main Rotor Housing be bent - i have examined it and it looks OK - as before - always had a bit of a wobble at low rpm then straightens out when head speed gets up - ALWAYS been like this - and most EP helis I have seen seem to be similar with a plastic Rotor Housing!!

I am also going to replace the main bearings that support the shaft in the frame - they have a little play in them!!

HELP - I need HELP - this is really bugging me - i don't want to carry on buying all new parts and finding none of them fix the problem!!!!

Thanks

Sandy