So my metallica premium was built in 2016 and i know the coffin lock magnet grab is flakey but i feel its been way worse. So my switch registers hits fine and when i do the detect test on the diagnostic page it registers but rather flakey still. Called stern and they advised i changed the boatd under the playfield and i did that as well but i really feel its been beyond hard to get it to lock. I read out the coil and it reads fine. Checked for loose broken connections etc. I see a magnet after captive ball hit adjustment in the menu and it adjusts in Msec high being 5000 and low being 2000. Im kinda at a loss on what to do. Any feedback?