My recollection also is that when previously the subject of inclusion of the later die-cast "k0's" was debated, the intention was for them to run alongside Sandcastonly, not within. The hope was that someone would come forward to develop that new area. It never happened.
I have over the years continued to collect VIN's for K0's as well of course as for sandcasts, and update the VIN directory (as and when the editor will actually open!), and will continue to do so until Wayne / others suggest otherwise?
I also am happy to provide whatever assistance and support is felt useful as we move forward.
Chris R.