Easiest thing to do is mix water + water wetter and then add coolant as needed to achieve the freezing point desired:
GLYCOL
% BY VOLUME
°F
°C
12.5
25
-4
17
20
-7
25
10
-12
32.5
0
-18
38.5
-10
-23
44
-20
-29
49
-30
-34
52.5
-40
-40
That shop is very competent and this is a reasonable alignment for a modest track build. You can potentially run more camber, especially with grippy tires, soft sidewall tires, or aero etc. I would trust their feedback if you need changes made - they will steering you in the right direction.
you asked about where had pmu pads in stock.
I told you Japanese retailers because this is a Japanese company and nobody keeps these in stock in the US.
I even DM’d you that rhd, Blackhawk, and nengun are all good to order from.
Now wtf are you complaining about?
Order a different compound...