I should mention that RAM problems are a likely source for graphic glitches on PS2 consoles... :\
And considering that I have tested and used FMCB 1.8C on everything ranging from SCPH-10000 to SCPH-9000x (It works fine on 9000x after a BIOS downgrade) there were NO ISSUES.
SCPH-10000_GH-001 SCPH-15000_GH-003 SCPH-18000_GH-008 SCPH-30001_GH-005 SCPH-30000_GH-016(V4) SCPH-30001_GH-010(V4)
2xSCPH-10190, 2xSCPH-10350, 2xSCPH-10280
"**** j0 hackers!"
-Sjeep (As seen on TOXIC OS ELF...)