No need to drain the oil for doing the magnets?I didn't try RTV on the clutch cover because:
1) RTV is messy
2) wasn't sure it would work.
The original stator and clutch cover gaskets are some kind of metalic-plastic stuff. Possibly graphite - been reading up on those here: https://www.ramgaskets.com/gasket-materials/graphite-gasket-material/
On the factory clutch-side gasket, there is a special adhesive around the holes for the coolant pump passages. Don't know what the stuff is or how to duplicate it, but it's probably there for a reason. Given the work involved in replacing the clutch-side gasket (drain engine oil, drain coolant, disconnect hoses), I didn't feel like taking the chance.
For the stator side, gasket paper would probably work. No coolant passages, no need to drain anything prior to removing the cover. It only has to keep oil in.
Given that, I might try gasket paper, if I have to remove the stator cover again.