Re: Kahler vs Floyd
A Kahler takes a bit of tweaking to get properly set up, and can be a royal PITA when you first install it and set it up, i.e. getting the proper string/spring balance etc. Howver, unless you make a drastic string gauge change or drop your tuning 2 steps, you will never have to adjust it again. Keep it oiled, it will never be a problem.
As far as I'm concerned, the only advantage to a Floyd is better tuning stability during the most extreme dive-bombs, but a Kahler is superior in every other way. The Kahler will dive-bomb 90% as well as a Floyd, but it will do the more subtle Bigsby-like vibrato much better, smoother, and frankly more musically, in addition to wild dive-bombs. All IMHO of course.
The "G-string tuning problem" described in that guy's videos is a result on an improper set up. Been playing Kahlers since 1988, never had that kind of problem, period.