I believe the smaller hose you speak of also acts as an oil drain/return from the rear head rocker cover…but yes, also acts as a breather of sorts. I forgot about that hose.
Smithy.
Have checked smaller breather hose out of gear box all clear and dry thanks.
Removal of alternator rotor?
rattle gun will not undo bolt .
Can I make a plate up with 2 pins to drop in small holes on flywheel to hold while I undo with strong bar?
Your idea should work…just be careful not to push the pins in too far, might damage the stator. There is a clamp type holder for them too, like a big oil filter strap.
Smithy.