I have seen the difference between the tremolos. The Kahler 2300 "Pro" aren't worth it. I bought one thinking I would see an increase in quality because they are supposedly "hand made". Total bull****. The 2300 from my inspection was made to **** Q.C. standards. Now that's not to say that the Kahler is a bad tremolo BECAUSE IT IS DEFINITELY NOT!!!! It'll kick a Floyd Roses ass any day and believe me when I tell you that I have tried many versions of a Floyd Rose including an original German made one. All I'm saying here is that the Hybrid or "7300" is much more worth it and machined better. Go for a steel cam and teflon or steel rollers!