Okay, the one I had was the Small Box Version One.
It feels a bit anachronistic to see the article writer referring to the nacelle caps as "Bussard collectors," a terminology that wasn't applied to Starfleet nacelles until TNG (courtesy of Rick Sternbach, who'd worked with Dr. Bussard before becoming a technical consultant on TNG). I think back then we just called them nacelle caps or domes. I recall a Cinefantastique
article saying that they were referred to behind the scenes as "ball power modules."