Reshimming? Shit I'm glad I knew about that before putting the new starter on my car
. It works fine though, so I dont care. Back to the point. Your starter not disengaging sounds like a ignition problem to me, the starter does what its told and if its not getting the signal to stop it wont. I'd check for a break in the lead between the starter and the ignition, maybe a problem in the ingnition (is it sticking), an unplugged sensor, or maybe the DSM engine by Gremlin gummed something up when he was whackin it to that Evo you parked near last week.