UPDATE: since Steemit unfortunately doesn't allow to update and edit articles
(for some reason I also don't seem to be allowed to add a direct comment on
my own article, so I had to 'answer' yours x-)), I've moved it to Medium,
where I CAN keep it up to date.
Link: https://medium.com/@wp02542/ripple-xrp-offline-paper-wallet-cf2b102abdb2