This is an ancient concept for me. The idea was for a simple destroyer to be mass-produced, sort of a War Emergency type. In real terms, it was a technical test to see how well and how fast I could kitbash something new out of existing greebles. Originally the model (in 2008) was kitbashed over a weekend from bits of my Bellator-class. Now that was a ship on a totally different detail scale, so the result was very blocky. Since I've been updating models for 4k I realized that that old model wouldn't cut it, so in the same theme I took some new detail and did a 2-day kitbash again!
4k source at: http://fractalsponge.net/?p=3021