"I'm not sure where the disagreement is"?
From your thread and various comments on the issue of the "main energizers" I've drawn the conclusion that you assume the dilithium crystal (regeneration) room (i.e. where the crystals are "re-amplified" and/or "re-energized") from "The Alternative Factor" to be essentially the "main energizer" (or a Season One dilithium crystal converter assembly equivalent) through which the matter-antimatter annihilation energy passes to be transformed into energy for the warp drive and other applications.
I definitely don't think that's the case. It's a room where the dilithium crystals relax and regenerate. By closing the drawers (!) Lt. Masters (science division) apparently put the crystals to 'sleep', not to 'work', IMHO.
Just because we didn't see
the engine room/s in the engineering hull with the apparent dilithium crystal converter assembly and its casing during Season One, doesn't mean it wasn't there, yet.
Therefore I strongly believe these "main energizers" to be something else. I made a suggestion, though it doesn't necessarily have to be the best one available.