The next day another mechanic was found who insisted that the reason the U-joints could not be greased was that the propshaft was installed backwards. So off it came. Things flipped around. On it went. Still no grease gun would fit on the nipples. Off it came. Curt came to the rescue with some spare long nipples, which installed make it all possible. Nevertheless mechanics must be paid, even for things they break. I have thrown four U-joint in the past 10,000km, all on the front propshaft. Apparently despite paying mechanics to grease the front propshaft, until today it has never been possible; but no mechanic bothered to mention it nor refuse to be paid for not doing it.
And so it was off to the hospital for the slave to have a little help.