I'd go back to the car balancer remover tool Speedy and just hold the remover tool with vice grips and then tighten
the bolt as much as you can or just use a rattle gun on the car balancer remover puller bolt.
I haven't broken one of these alloy taperd flywheels yet this way, but when pulling the flywheel from the outer edges
they can break.
The one I removed took a fair amount of effort on the 12 inch shifter when tightening the puller bolt ,they always
take a fair amount of force to remove the flywheel from a taper.
Cheers
Max.