That style Hadean solid body was the first on which I had the bridge changed, ultimately six of them. Then I switched to the violin/Hofner style hollow body, which required Eric to make a riser so that the bridge aligns with the top of the fretboard.
I've been buying bridge #1 on eBay from Guitar Madness, the other place stopped carrying them. That one is a little more compact than #2, but I did use #2 on a Hadean bass to give it a bit of a Fender look. Eric found that the much higher cost of the GraphTech was not worth it, especially since the one I bought from them also had a bad saddle, which they replaced immediately. I did recently buy a gold GraphTech because they're the only ones who have that color.
Yes, the bridge with four tails, Eric solders to a single tail that I cut off the existing pickup that uses, which plugs into the preamp. The GraphTech model has small adapter cables to bring together the four saddle tails, which then gets soldered to the plug.