That's one of the problems with trying used Ricks, especially older 4001 models. Not many shop techs know how to adjust the necks properly and can sometimes actually bend or break the hairpin "rods," or crack the neck, or lift the fingerboard. The correct method is quite simple, really, but completely different from a standard truss rod. If done correctly every time an adjustment is needed, even old 4001 will play just fine. But it takes just one nimrod along the way to mess it up, and then the next one is left scratching his head and concluding that Ricks are always like that. Pretty sad, really.
Took me a while to get my '79 4001 where I wanted it. Had rounds on it for a long while and was good but put some JF344's on it once again and it's wonderful now and the low tension straightened out the neck a little more. Had to relearn the trussrod again after i got it 3 or 4 years ago, big props to Joey's Bass Notes and the RRF.