Agreed, these external coil flywheels almost always come off very easily.
Back in the heyday of the coil-under-flywheel FC Victas, the workshop in my family's Cobram, Vic OPE business [we owned it 1973-83] used this 'two screwdriver' method as routine, and rarely had to resort to the screw type puller.
I'd guess that you'd encounter more 'rust-bound' flywheels on these motors now though, than we did back then. Because these flywheels actually aren't on a tapered shaft, they are actually more prone to becoming rust-bound, if any water gets in there.
Cheers, Gadge
"ODK Mods can explain it to you, but they can't understand it for you..."
"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."