Did you check what the elevator looks like with the trim adjusted for level flight? Try and hold the plane so that the tail is level as in normal flight and see if the elevator is level with the trim adjusted. Then move the trim back to centre and see if the elevator is up about 1/8" with centre trim. I would give the elevator more down by adjusting the clevice 3 turns by which ever direction you need to turn the clevice to lower the elevator. 3 turns will be enough to see a change in flight characxteristics but not too much that the plane will be radically different and scare you. The amount of change may not even be visible but the plane will notice it and fly accordingly. Test fly and go 1 more trim either up or down until the plane will fly level with the trim at centre. It may take a few flights to get it right but once you have it you don't need model memory for the trim.