Well, I installed the Hipshot bridge on my Epi Classic Pro tonight and am I impressed! Very simple installation: remove old bridge with its 3 bolts, and put on Hipshot with 2 supplied metric bolts. Don't overtighten. Hipshot supplied the allen key to install the bolts as well as the allen key to make string height and string spacing adjustments. Intonation is accomplished with a phillips head screwdriver. The string spacing adjustment came in handy as the strings were slightly off center toward the top of the bass - very slightly. . . I am just fussy. I easily centered them using the spacing adjusters.
It is great to be able to set individual string height. My bass now has overall lower action with no fret buzz, and is better intonated. Better playability all around. As far as sound quality is concerned, I won't know for sure until band practice on Friday, but I already notice an improvement in sustain. If any T-birders ( Gibsons too - both metric and non-metric bolts are supplied ) are on the fence about the Hipshot bridge all I can say is: don't be. Well worth the money and a terrific upgrade. Cheers!