So, I'm planning a custom build, it's going to be a Fretless, with Nordstrand Big Singles in a J configuration. My plans are to have the passive controls in a V/V/T setup. I'm also considering putting a Nordstrand or Bartolini Active system in as well, with the intent of having switchable Passive/Active mode. Are there any downsides to doing it like this? I like the sound of passive, but I also wouldn't mind having a second set of controls to fine-tune my tone if I wanted a different kind of sound. It seems to me that Switchable passive/active isn't as common as it would, seeing as it's the best of both worlds, capable of running passive, and the Active there when needed. Am I missing something here, or is it just a convenience sort of thing? Also, I notice that the Nordstrand active system has the Passive/Active switch in a Push/Pull pot, is that hard and fast, or could I have it wired to a switch? I don't like the idea of having that set to a push/pull knob, since one of the two becomes a more "Default" setting, simply by virtue of the knob being easier to push in than pull out. I don't really know much about wiring and such, so that may be just small potatoes. Anyway, any and all answers welcome/appreciated.