The colors are temporary. The orange are the engineering systems, the red are the engine rooms, green are the turbo shafts, and various other. The final version will be monochrome. My drawings are based on the TOS, TMP, TNG, ENT canon. In that, the deflector dish has many functions and there is equipment behind it for that purpose. That is the ovoid. Similarly, my engine system is a horizontal warp core. The large tank is a cylinder that lines up with the big yellow circle on the bottom. In front of that is the deuterium processor over the gray T shape on the bottom. The warp core leads to a vertical shaft topped by a bar wide enough to line up with the pylons. The plasma stream is split in 3 with the third going up to the impulse deck where it powers the impulse engines and all saucer systems (with fusion reactor backups for emergencies and saucer separation). The two plasma conduits go up the pylons to power the warp coils, the same as NX-01, 1701 refit, and 1701-D. I have not bothered to draw the inside of the warp nacelle as of yet. I prefer cross sections to show the inboard exterior of the nacelle rather than the guts. But that could be a separate drawing. I don't intend to call out every detail on the drawings. Only those where I have set drawings that fall on the centerline.