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I have updated the design of the Minstrel ZX80 clone slightly, the new boards are V2.5.
Update:The current stock of boards have been updated to V2.6.
2022 Update: At the time of writing, there are still a few Minstrel 2 (ZX80) and Minstrel 3 (ZX81) kits available from The Future Was 8 bit but those are the Final Edition kits, there are unlikely to be any more.
I removed the 24pin/28pin jumpers on the next revision. Too many people missed them out or didn't know what they were there.