To clarify , any weak magnet should be able to be made stronger when parred temporarily to/with a stronger magnet in the correct manner . How long and at what level the effect will last would be limited by the 'quality' of the base material of the weak magnet .
I am debating which method to use , one or maybe both :
Attaching small neodymium ( N52 ) magnets to the corners ( North & South ) ,
Or , rubbing / stroking the weaker magnets with a single bigger / much stronger neodymium magnet .
The flywheel I'd experiment with will accommodate small magnets on the back outside corners of the installed permanent magnets . Obviously , the small magnets would have to have the proper north/south orientation to be any kind of effective .