I got delivered a front one by mistake, it came with the longer lead, obvs and all the grommets etc were wrong, and it needed the O ring as mentioned above.
But with a bit or jiggery pokery, the longer lead was threaded through and modified to fit and stay in place, with the O ring it fit fine, the bolts that came with the kit were too long so I reused the old ones.
To free off the hub I simply undid the four bolts a tiny bit then clouted them all on the back with a hammer, they freed off just fine, so the hub came off easy, no need for a press..
The problem you may find if you only have ordinary torque wrenches is the huge torque needed to tighten it up. Many of us have simply used body weight and maths on a long bar, to do it.
I did mine a couple of years ago and it has been fine since.
Not really a hard job at all compared to some on the Disco 2
Best of luck mate!