Silex Systems Limited announced the successful completion of another key milestone in its project to develop a process for the commercial production of high-purity `Zero-Spin Silicon' (ZS-Si), using a variant of the SILEX laser isotope separation (LIS) technology. This project is being undertaken in conjunction with project partners Silicon Quantum Computing Pty Ltd. (SQC) and UNSW Sydney (UNSW). The Silex LIS technology has the potential to produce ZS-Si efficiently and at scale to provide a secure supply of this key enabling material for the emerging silicon quantum computing market with initial sales targeted in 2023. The three-year project is scheduled to be completed at the end of year 2022 with the commissioning of a commercial pilot production plant, from which the initial output will be sold to SQC under a previously announced offtake agreement. The three-year, three-stage project is due for completion at the end of the year 2022 with the planned production of initial commercial quantities of ZS-Si from a SILEX pilot production facility. The first stage, completed in June 2020, involved a `proof-of-concept' demonstration of the silicon enrichment process using laboratory-scale equipment, and initial optimisation of the process. The second stage of the project, currently underway, involves the design, construction, and operation of scaled-up prototype equipment, including for the feed material synthesis as announced on 19 January 2021, with the objective of validating the silicon LIS technology and scalability of the process. The second stage includes several more separate milestones due for completion by late year 2021.