Update: I have done about 2000km, and everything is still good.
It's a long video, if you have any questions just ask them in the comments.
It might not be the best way of doing things but it worked for me.
Tightening torques: Pinion nut (41mm socket) 250 Nm and then 1 deg increments until rotational torque is 1.1 +- 0.2 Nm (These are from Land Rover manual: https://www.s80.dk/DIY/rearDiff/misc/TOPIx-WSM-7811-%20Workshop_manual%20Freelander_2_%202007-10-14-%20Demontare_si%20remontare_rulment%20diferential.pdf ).
The video contains all the bearing and seal numbers. The kit cost 200€ off Ebay + Haldex filter, oil, and diff oil. Took me a bit over a day including the tool searching and making.
The thing I made for measuring rotational torque looks as it looks just because I only had one type of springs to use so I had to keep adding them to get to the right Nm scale.
TIMESTAMPS
00:00 Removing the axle
02:38 Removing propshaft
07:11 New parts I bought
09:36 Pulling diff apart
13:44 Trip with Volvo 780
15:37 Undoing pinion shaft nut
19:15 Removing bearings
20:12 Putting in new bearings
22:47 Pinion shaft torque