Could you consider adding a resume craft option, to be used in case of disconnections and/or Duty Finder's Duty Ready?
As suggested in another thread, you could give out a set number of daily "resume-up-tickets" to be used by each players only when a very valuable Synth is being performed (thus not having to track every single Synth performed on the entire server); could as well let only Master Crafters the allowances, to reduce even more the amount of tracked data.