On target at almost one-third of the way through, the EDSAC reconstruction project volunteers meet in October 2013 at the University of Cambridge, where the original EDSAC was built, to discuss progress.
Andrew Herbert gives the project overview showing what's been done, being done and awaiting work.
Nigel Bennée continues to unpick the design of the arithmetic unit.
Chris Burton explores some of the frustrating mechanical problems.
John Pratt shows progress with the coincidence unit and the elimination of noise spikes.
Peter Linington reports on the nickel delay lines
And EDSAC Project trustee and head of the Cambridge laboratory, Professor Andy Hopper visits the project.
Filming by David Allen.