Welcome! I know which Angela you mean and I've discussed the first 2 issues with her quite a few times....
Issue 1 hood micro switch - https://zroadster.org/articles/bmw-z3-hood-micro-switch-replacement.52/
Issue 2 seat bushes - https://zroadster.org/pages/BMW-Z3-Z3M-Seat-bushes-for-Roadster-Coupe/
Question 3 - I've been using MTech grooved disks with EBC yellow stuff pads on my Z4 for a while, although not on track! Huge improvement over standard quality stuff.