While replacing my prop shaft bearings a few years back I said to the missus - "just smack it square on with this hammer while I hold it" Eyes closed - <smash, bang> "woah woah woah" <bang smash> "woah woah!!" The splined end of my VCU was now somewhat spline free. Called a guy on ebay breaking a freelander. "how much for the viscus coupling mate?" He went away and came back to me "It doesnt have a fan on it mate, sorry". After explaining to him it was a big plack barrel shaped thing on the prop shaft he went away and came back again. "yeah mate - its got one of them". "It will be about £15 to post though - do you still want it?". I asked how much he wanted. "erm, dunno, £30 sound ok to you?" Damn right it did. Put it on - tested ok. The poor ignorant fool. God I love ebay.