Managed to get some more work done this weekend.
Cleaned the pipes with some pipe cleaners from amazon worked a treat the pipes wasnt stained and came up like brand new, i flushed the loop with water at first then rinsed through with RO/DI water.
Put the loop back together for testing and filled with Acid Green 900ml pre mix.
Installed a test strip of UV lights and POW this thing looks radioactive!!!!!!
The Corsair LL120 fans are SILENT, havnt got them lighting up yet as waiting for a few more parts to arrive.