Hi Watt, "Contemplating the Engine Room" has some of my favorite recorded bass tones. The opening notes are so tasty. I like the sound of that blue Thunderbird. I'm planning to build a somewhat Thunderbird-ish bass for myself. So I wondered if you could tell me: 1) Did you use any other basses besides the Thunderbird? 2) Does the thunderbird still have the original pickup? If so, do you know of any other pickups that sound similar, since I probably won't be able to find a real Gibson one? 3) On the Thunderbird, how much of a difference does the Bartolini preamp / EQ make? Does it just give you different options, or does it inherently change the basic character of the bass? 4) Did you only use the DI signal, or was there a mic on the amp too? 5) I notice a lot of your basses, like the "purple plower", have Bartolini pickups. I might go with Bartolinis but they all come in "deep" and "bright" varieties, and when I play basses with bartolinis in stores, the salespeople never know exactly what's in them - so, which do you use? Thanks!