So watching Trekworks revised build of this kit, and found out a couple things I could do right now before I have everything together. He cuts down the rear of the ring inside the lower saucer and the support prongs for the dorsal, as he says they interfere with the fit when sealing the saucer. He showed what he did, and he just cuts them down by 1/2 in. Or less.

Also could start spraying the interiors with flat black and then either white or silver.

EDIT: Just tested the fit of the saucer halves. Mine seem to fit perfectly. As of now I see no need to cut the support structure down around the dorsal connection area.