@Courageous: honestly don't have a clue how the air gets in the bolsters. Must be some kind of electronic gizmo that can produce air - it makes a proper airbed like noise when deflating too 
Heater switches just use the standard switches in the Z4, so you need these fitted in your car. As far as heating, seat movement, bolsters etc. they are all plug and play so no changes required. There are subtle differences for the pretensioners, read through the thread linked earlier. Note I didn't fit the passenger seat so don't know what the seat sensor situation is (suspect possibly similar to pretensioners, may need to swap something over from you car)
@Kev: thanks for the PM. Can give you next dibs for a week starting today, so if I get any more interest I'll either need a deposit from you by next Weds (20th Feb) or will move on to anyone waiting - hope this sounds reasonable to you.
Heater switches just use the standard switches in the Z4, so you need these fitted in your car. As far as heating, seat movement, bolsters etc. they are all plug and play so no changes required. There are subtle differences for the pretensioners, read through the thread linked earlier. Note I didn't fit the passenger seat so don't know what the seat sensor situation is (suspect possibly similar to pretensioners, may need to swap something over from you car)
@Kev: thanks for the PM. Can give you next dibs for a week starting today, so if I get any more interest I'll either need a deposit from you by next Weds (20th Feb) or will move on to anyone waiting - hope this sounds reasonable to you.