RD,
For "off," I suggested heat with a puller. For "on," I suggested cold on the crank and heat on the bearing. Maybe this fits your description of gentle persuasion, but experience with this bearing on my bike tells me it can't be gently persuaded off the shaft if the fit is right and tight. When dismantling with a puller, you need a puller that avoids the shims. This is what I tried to accomplish with my crude home-made puller, which has worked successfully several times now, despite its shortcomings.
Now. it might be that the cush nut is supposed to hold it all tight, but there are plenty of cases of wasted shims here that are not all due to a loose cush nut, I think.
If the following pictures come through, I have a feeling I will get some admonishment from a real toolmaker.
Richard L.