Well got the loop cleaned up today. The block was gunky EWWW
Also the insert in the block might have been in upside down. So hoping that fixes the core temp discrepancy a bit (like 8C difference between core 0/1 and 2/3 (not sure hte exact numbers,, two of them report 8C differnet than the other two. Looking at hte block design if the "channel insert" was in backwards that would explain it.
HDD should be here tomorrow so going to try getting this all installed in the case today and starting leak testing tonight