My '72 P-bass had gone silent, and in researching replacement electronics, I stumbled on Obsidian. After reading the reviews, I decided to give myself a break and not have to worry about soldering. Of course things rarely go as planned, and when I took a close look at the existing electronics, I noticed that I had two live leads coming from the pickups. I wasn't surprised as the bass had been modified by Alembic back in 1976, and at that time they replaced the original pickups with Seymour Duncan Quarter Pounders. After a little pondering, I decided to strip and twist the two leads together to create a single live wire. My first attempt at installing the Obsidian unit resulted in silence. Then I realized I had flipped the unit upside down, and once I got things properly oriented and reconnected, I was rewarded by the best sound the instrument had put out in years. I guess the point is that the solderless connections are very forgiving and allow for a bit of trial and error without the hassle of soldering, unsoldering and resoldering. I found the resulting sound to be much cleaner, wider in frequency response and just plain better than the old pots and wiring. I highly recommend Obsidian for sound quality, ease of installation and flexibility during the installation process. Pros and novices alike will appreciate Obsidian's features.