^^^ yups while tm might have better quality control and better gearbox tolerances (gotta love the japs with QC except toyota). I've seen lemons from other high end brands giving head aches out of the box (like mis aligned gear axles from CA, mis feeds/double feeds from G&G even a PTW breaking in half out of misuse).
This doesnt mean that "clone" brands arent workable.
Patience and practice in time it will be easier, believe me i own one. (i dont know how bad is the arms race here but in my country china "clones" come in 400-420fps oob and only needs shimming and greasing)