^ after further searching:
PROXES R888 | Toyo Tires
I found different information previously than what the link is showing. Kind of funny but the wear marks are perfectly at the top of the wear indicators when I filled 35 PSI cold and then ran on the track. Fairly solid traction with a touch higher pressure as well.
Hmmm….. now the guessing/estimating the best PSI before running begins.