Flattery will get you everywhere Richard.
The only thing to add to your puller, is a central bolt to work on the end of the shaft like a normal puller.
Once it's set up and tension is applied, boiling water over the bearing should get it moving.
With a bit of care, determination and a bit of gentle force the rollers in a steel cage can be removed. On reassembly the tangs of the cage need to be peened back in a tad to hold the rollers.
Cheers