yukka62:: ... Century 3D Pro ... when i throttle up i get major neg pitch & the heli tries to force itself into the ground!!,
Pushing forward on the collective stick ( "throttling up") should give you more positive pitch. If it's going less positive then your pitch function is reversed. If your heli is non-CCPM then change the setting of the pitch channel (nom/rev). If your heli is CCPM, then change the polarity (+/-) of the pitch setting in the SWASH menu.