Supplying dealer (3rd Party) is being very awkward and won't do the adjustment before I collect. So I'll have to DIY when I get home, does anyone have an up to date guide/video?
As I understand it:
1) Disconnect negative terminal
2) Disconnect 2x sensors under seat
3) Unscrew T40 x2 behind seat
4) Unscrew T40 x2 in front of seat
5) Remove seat + Make adjustments
6) Try T40 in holes before re-seating, lube if necessary (what exactly do I need for this? WD40?)
7) Replace seat and screw in, 35-39nm torque & reconnect sensors
8) Reconnect negative battery cable and hope the airbag doesn't explode...
By Jove, I think you've got it.
Although you might need to change the order of #2 & 3, also 7 & 8 due to not being able to get your hands under the seat to connect/disconnect the plugs with the rails screwed tight to the tub.
I did them without taking the seats out (didn't even need to disconnect the plugs IIRC, but maybe loosen a harness strap). My way was awkward and can result in scratches, though. But my back wasn't up to wrestling seats in and out of the car, and my garage did not afford me the width required on both sides without moving the car between doing driver and passenger sides.
Might want to add "4B) put padding down over sill and against centre console." to prevent scratches.
I'd use only a very gentle spray of WD-40 or similar, onto the bolt (not in the hole) to test fit the bolts prior to reassembly. I don't think that lubrication is the answer - the thread is either clean, or it isn't. Not convinced that any kind of oil is great for the tub long term (but I don't know that to be the case). Blow it out with canned air, or be prepared to vacuum out the holes or even run a tap through if you encounter much resistance. There is just enough room to work, with the rails installed. So knowing that you have 4 good holes before you start is very helpful.