As a point of interest, we once had a PA28 in the hangar for an annual inspection. We found the stabilator to be badly mis-rigged and adjusted it in accordance with the Piper MM. The aircraft was subsequently test flown by a very experienced ex-RAF flying instructor/civilian formation display pilot and was reported as handling correctly.
The owner collected his aircraft, took off and immediately returned (or maybe aborted the t/o, I forget after 20 years) with a 'pitch problem.
He'd been used to flying a mis-rigged aircraft...