If I remember correctly, Moonraker's Tholians were perfected conversions of the Klingon Academy tholians. And he was doing a heck of a lot more for more than just SFC/SFC2, he worked on KA, and he worked on BC, and he had a lot of unfinished projects. The Tholians from KA to SFC2 were one such, if my memory is still serving me right.