Jay, did you use Weicon anti-seize on the driveshaft spline?
http://agaus.com.au/wp-content/uploa...-Seize-TDS.pdf
Seems this stuff "plays better" with rubber/plastics vs copper base anti-seize (concerned with rubber boot spline seal life).
Bentley states Weicon or equivalent. I'm unable to find any reputable online source stating suitable equiv.
Front DS spline looks great, no need for longer spline mod!