@foone I don't know the actual copier mechanic: How about an old-fashioned linear CCD sensor mounted above/below the drive entry and scanning the disk when it enters/leaves the drive?
That leaves more options for scanning the top, including scanning them in the hopper in bulk (requires on opening) or by moving another linear CCD across the drive slot while the disk is being copied.
(Your nice rotation device prototype would go unused, however 🤷)