Reporting success on a TDS2004C turned 2024C! Model ID changed from 1E to 19.
First I was sceptical, because the Flash was nowhere to be found, but it’s just on the solder side of the PCB and actually easier to remove.
For 4 channels there were four filter banks of 10 values each to change from 07 to 0F, other than that, straightforward. Initially reports self cal fails and clock was reset, but after self calibration and setting time and date, boots smooth as silk :-)