+1 What Masher said, except on bridges that adjust intonation with a screw in the back, I find that it's not necessary to loosen the string. I've been playing 30 years, and in all that time, I think I may have broken one string adjusting the intonation while the string was tuned to pitch. I have a couple bridges that do require it, and it's tedious and I dread adjusting intonation on them. Especially the guitar with the Floyd Rose...geez, what a pain!
Bass Extremes, I was born with perfect pitch. I really didn't know I had it until I was 16. Up until then I thought everybody could hear pitches and know what they were without a reference. I'll tell you this though...having perfect pitch + a dollar will get you a cup of coffee. Yeah, I can figure out chord changes and basslines a little quicker than the average person. But it doesn't make you a better musician or a better singer. Learned that lesson the hard way. I can sing out of tune just as well as anyone. I can hear pitches very well, but I have to struggle to get my voice to match the pitches in my head.
As for the David Burge course, I have no experience with it, but I have talked to a couple people who have gone through it, and they say they do hear pitches better but don't feel they've developed perfect pitch as a result.