HPDE at MidAmerica motorplex

[CB762]

Took the car to one day HPDE to MidAmerica Motorplex (http://www.midamericamotorplex.com/).
It was Porsche Club event with lot of Caymans, some 911 (including couple GT3) and plenty of older ones.
Upgrades:
- 17x8 Enkeis RPF with 245/40 Kumhos V710;
- Carbotech XP10/XP8 with stock rotors;
- Motul 600;

Inflated tires to 35 psi -- it was bit much. Dropped around 3 psi at front and 4 on rears. Ambient temp was around 80F.
Car did just great! Obviously, it can't keep up with Caymans S on the straight but in corners I was easily stay on their tails.
Plenty of braking power, I was able to engage ABS many times. I'm not sure now whether I want the bigger brakes.
Suspension needs upgrades, camber first. And a bit of stiffness.

Now scary part: I was changing rotors/pads today and found that one pivot bolt on front caliper is missing! And I have no idea when it was lost, there was no any change in braking. All bolt were torqued to the spec and double checked before event.

Here is the link to video (don't know yet how to embed):

First half is quite boring, there is some action later. I will find better camera location next time.

[CB762]

Note on the oil catch can (Cusco): not a drop of oil in the can, not trace in hoses.
The question: was it an upgrade of any value?