rears look pretty straight forward and from the searchs I've done...
cutting... shimming and extending seem to be the way,
I was also considering drilling a few holes along the new tube to allow some extra welds to join to the originals well. not really keen on having them let go, good/bad idea? or does anyone make adjustables for rangies at a reasonable price?

Fronts i couldnt find any info on

Cheers
Simon