And all QuickInstall development this year was spawned by this specific build!
With 1.0.1, this error is recoverable with the 'Retry' button, *AND* the new DMA disable options prevent it entirely!
So the PCChips Celeron 466 shitbox now has a working QuickInstall....ation :)
I finally found a board/drive combination where I can reliably reproduce this often-reported error in QuickInstall, so it is now time to implement read-retries and error handling :)