I just came across this video recently, where Ian Allison presents some amazing one-off builds from Spector (Woodstock, New York). In a recent post from @Dr. Cheese, he had asked folks to post songs/artists that were played with a boutique bass (great conversation) and there were some Spector references and then questions about whether or not they were still boutique... well love 'em or hate 'em, I think there is a lot to appreciate in this video that shows some amazing artistry and craftsmanship of each of these unique instruments.