Hi Christian
My idea would be to use the K3S with SDC plus a suitable logging program.
At the moment, SDC integrates with the Expert Electronics transceivers using TCI and with the Flex Transceivers using SmartSDR, but not yet with Elecraft.
With these other rigs, the SDC skimmers put the CW, RTTY & PSK call signs for example on the transceiver Panorama and follow the transceiver frequencies & modes.
That would be the objective.
73 Ray G3XLG