I got these all done earlier this morning. No real challenges this week - normal difficulty.
Tokyo Expressway - Honda Fit Hybrid '14 - I initially bought some SS tires on the car, but that put the PP way over the suggested amount. I went with CS tires instead. That left me slightly under the recommended PP, but still easily within reach of the win. First ticket achieved.
Grand Valley - Ford Mustang Mach 1 '71 - I upgraded the tires to SS, but didn't make any other changes. I was only able to get a P2 finish. The car has plenty of power, but can't really make use of it on the long straight because the transmission only has 4 gears. It hits the rev limiter, topping out at 190km/h. Still, P2 is enough for the second check mark. Good enough.
Grand Valley - BAC Mono '16 - Like the other Mono events, the only upgrade I made to the car was the tires: SS. Easy win. Second ticket achieved.
Deep Forest - Nissan R32 GT-R NISMO '90 - I went completely overboard with modifying the car. I thought I remembered these GT-R events needing the car to be right at the PP limit to be competitive. Now that I've done it, I think I was mistaking it for the Silvia series. I got the car up to around 650PP and had no problem blasting through the field. Easy win and fourth check mark.
St Croix - Ford GT LM Spec II Test Car - I went with a 4RS-4RS strategy on this. It required some short-shifting to make the fuel last 4 laps. I took fresh tires on the pit. Easy win. Third ticket obtained.
The roulette ticket gave me 500,000 credits, which I'll happily take.