you say the plane dives down even with the trim all the way back...ok you got off the ground...so what are you doing when the plane dives down? wheres the throttle? do you have to have constant back pressure on the elevator stick to keep it level?
start simple disconnect the elevator pushrod...center the elevator trim on the transmitter...get a couple of scrap pieces of hard wood and sandwich the elevator between them at the tip of the elevator....now turn the clevis in or out to match the hole on the control horn...did you have to adjust the clevis?
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