Now that I'm thinking about it, if I had to choose between gambling on one of the shops in the county that I presently live in, or doing it myself... I would without question do it myself! Haha
I have a awesome differential guy... But he is 4 hours away.
The only real "tip" that I can give you is once you start tightening the pinion nut during reassembly, you can't loosen it back up.. You must tighten it and check the preload frequently to avoid over-tightening.
The worst that can happen is you won't be able to get the preload set correctly, and then the crush sleeve will need to be replaced so that the proper preload can be set.