A followup on the Reliant. So matching the bridge tops up it would seem that the Reliant could be about 6% less wide than the Enterprise. After re-scaling my model, now the Reliant's volume comes in at about 210,000 m3. What's interesting, when scaled smaller, the phaser mounts and decals are much closer to the same size between the two ships...
Out of curiosity, what happens to the scaling if you work from a side profile accounting for the two decks of the saucer?