Ok so let's rule out a couple of parts that have been replaced

Ball links
Main motor
Main shaft
Rear rotor

My heli struggles to get off the ground when I have the training gear on it seems. However with it off it seems to be alot easier to get off the ground. Aside from the above parts any other things I should check? I re-aligned my blade pitch it's now at 1-2 deg positive. in idle up mode with all trims centered.

I'm running the plastic blades (which I'm suspecting are too heavy)

If anyone of you have experienced such a problem with lack of power for take off please share.