So I have a ‘86 252 that has had more than its fair share of magneto issues, the latest being a failure of a 40-hr (Slick......) mag. The AMT asked if I’d thought about having a vent tube put in to keep the mag temps down. He said the failure mode (secondary coil) suggested damage from chronically high temps. I’ve never noted anyone disussing this issue on any model Mooney. Have I just been living in a bubble? Has anyone else had a chronic mag problem?