Hola Stefo....
Do you guys think, I could also leave all the stuff in there as it is and go for a weld all around the inner shaft; so basically welding the inner shaft directly to the outer hub? Actually just where I drew the blue line on the picture in my first post (I’m after a fast fix, that lasts for the summer).
It *may* work, but I doubt total success unless they're good welds and it may be irreversible (carry on), but you'd need to weld both sides, as;...... The hub is a composite of three (3) separate parts; The 'crinkle' part is actually two halves, with the splined sleeve through both, and there's (I think) four rivets in each half.
You'd need to check that the two halves haven't slipped sideways or slid apart on the inner as that may affect the spokes (probably unlikely), but best at least to locate the holes in the inner and align all holes- probably easier to pull the bearings and retrieve the rivets (they might rattle around and drive you crazy) and then you have rivets to plug the 'oles, locate the bits and something to weld on to.
I've actually welded the rivets on two wheels, but I don't remember if the first (which I think was/is a early swing arm wheel) ,was done in situ, or if I pulled the bearings out or not, and is easier than the plunger hub which was a bugger to remove the bearings. This was a bare hub that I bought, welded and had chromed and is in almost daily use ...(but I noticed the other day a fair amount of backlash in the splines- off topic )
(I'm not sure if this is finished, but have run out of steam/cells)