This looks great... a lot of work involved in what you are doing here!
Are you doing it from the Circuit diagrams or from a bare original PCB?
I'm interested in spare 2650a 's as well ... that's the worst thing about buying a non working zac... hoping your processor is not toast.
The only other issue I have is displays... but i'm going to do a set of boards using some off the shelf led's to fix this issue.
Great Effort... I know how long it took me to do the displays which are simple compared to this.
