I've been trying to find a reference to the board rework removing the high speed serial capability. I heard about it originally in a video or podcast and I'm go

I've been trying to find a reference to the board rework removing the high speed serial capability. I heard about it originally in a video or podcast and I'm going to do some digging to find that. To correct the record, though, the board rework story references the C64 motherboard and not the 1541 board.