DONE!!!! Fully installed with ventilation and airbag function - no seat heating. Can't test function yet because now it's cool and stormy.
Besides the mounts, you'll need to:
machine a custom shoulder bolt to mount the seat buckle
fabricate a bracket to position the buckle
re-pin the side air bag connector
make a jumper wire for the seat position sensor (this is polarity specific)
switch the main ground to the last pin in the seat connector coming off the car
wire in the spare 3 wire connector to ground and power (I have no idea what originally connected to it)
wire a switch to short ground to white for the fan
code out the occupancy sensor - I'm not good at it, claude was a disaster, chatgpt was way better.
Seats definitely can sit way lower than stock powered BMW sport seats.
Here are the rest of the pics -
https://photos.app.goo.gl/8b3LTeF3MjSZdY9E8
Leaving this spot for the video clips I took -