So she's rebuilt with the upgrades added, not recommending the integy camber links, the balls broke free under minimal stress!
Also the servo saver is set super loose as standard - need to see if I can tighten it up but currently the spring is soaking up any and all turning. Nice bit of kit though!
I have put 500k diff oil in the central diff, gave it a quick blip on carpet and it wheelied!
Will report back when I get time to get the servo saver configured