There’s actually not a huge amount of info on DIY fitment of upgrades, plenty of people have swapped existing MFSW for different styles etc
I was working on a MFSW with a member last night funnily enough and we had a few issues with it not working (we suspect wrong button loom) when this is resolved you can expect a write up and a couple pics explaining the procedure but basically it’s straight swap of the old wheel for new one (with correct buttons/loom/airbag) then you need to install two additional wires from steering wheel connector back into the dash, more details to follow when resolved ......