I was thinking about upgrading electronics in my XB75p this summer, as well as replacing the bridge. Just wanted to hear any experience from carvin users that have swapped on-board preamps. Of course, I was thinking Bart or Aguilar, but what do you think would be best? I'm open to anything at this point - just brainstorming. I'll take it to a tech if it turns out to be more of a job than I can handle, but I also like to try electronics jobs myself for the learning experience.