Nice write up. Thanks for posting. I would suggest the following:
- lower pressure to 40 psi/frt, 38 psi/rr hot
- remove the front strut alignment pins and slide the strut hat over (gains -.5 deg)
- turn off the electronic nannies
- trust yourself and the car a bit more
Regarding the seats, a lot of guys are beginning to use carpet underlayment (the stuff that keeps the area carpets from sliding) on their seats at the track. It works surprisingly good, and you do not have to have the bolsters set to "clamp" you in, making things uncomfortable.
The best part is that you had fun and remained safe, anyway!! Win-Win!