Hi Steve, I've not had my xb4 that long, but I'll try and give you some tips!
If your using the front camber link re-enforcement plate then removing the diffs can be abit tricky (same with using the thicker non standard shock towers) I'd suggest just taking the shock tower off if this is the case.
Removing the diff internals is quite easy aside from one of the bigger internal gears. Luckily I have the steel one so its easy enough with a magnet, Not too sure how you'd do it with the composite ones but hey.
make sure you put the pivot pins in the right way round! (sounds silly but I've nearly done it a few times) same with the steering bushings.
Apart from that its all really easy to work on and the manual is great
