Thank you for that John! Yes, that does indeed cover it.
Looks like I was close–but I had overlooked the cache locations which the page you referred me to goes into.
Thus, I do indeed keep my OS pagefile on the SSD, the source and project files on drive D:, and the preview/output/export files AND the cache files (including the DB) on drive D:.
Yes, simple, once you know!
Cheers,
Sam