The AAO’s 4MOST/AEOSOP team passed with flying colours the Long Lead Item Final Design Review (LLI FDR) that took place at the AIP in Potsdam this week. The feedback received at the end of the review was “A very successful review for the AESOP team!”. Having reached and passed this significant milestone in the project, the team now moves on to the task of constructing and assembling 2,400 ‘echidna’ spine positions required for AESOP.