Changed mine a few months ago
Make sure you disconnect the battery first & pump the brake before disconnecting. You will need a T30 security Torx bit to remove the 2 screws. Also make sure the wheel is dead centre before removing it. A few of us have had problems earthing the horn, I ended up modifying the connector to fix them straight to the hub but a few days later I found the actual spacers with the connectors for the horn If you get the Works Bell short hub then thats the one that puts the wheel nearest the OEM position & it also comes with the resistors for the airbag. Also be a bit careful when unplugging the airbag, I think that Steve damaged his when he swapped them over
Its pretty easy to swap over, I took about 45 minutes to switch them over.