Tell us you trained on Diamonds without saying you trained on Diamonds. In everything Iβve ever flown (152,172,172RG,182,Archer,warrior,arrow,Seminole, SNJ-4, DA-20, DHC-8) the trim would displace the controls as it βflewβ the tail. Full displacement. I even had training evolutions that involved landing only with elevator trim and rudder. And the yoke displaced exactly as expected. As if a ghost hand was pulling on it. Except for the DA-20. Because it just used spring tension to βtrimβ not an actual aerodynamic trim. Hands off on the ground it always would sit full nose down stick. You still displaced the stick to a different point given what you wanted your pitch attitude just like any plane. The spring just relieved the fixed nose down tension diamond built into their system.