There is a large potential range in the FOAK costs of each technology, given the accuracy of the capital cost estimate, the potential range of possible process contingencies, variation in energy prices, range of possible discount rates, and range of possible transport and storage costs. Due to this uncertainty, singular point estimates for the cost of DACS provide little value and should be avoided in the public discourse in future. The capital cost accuracy, and range of process contingencies in particular, reflects the immaturity and perhaps more the lack of publicly available technology design, performance and cost data.