Here is our latest developement of our Acu-Z bridge for guitar: we added a piezo under the saddles.
To let the piezo sounds fine, we routed a small chamber in the body, under the piezo element, that is then covered with a wood top, just under the bridge.
On the taste of the player, we can supply a basement that features traditional bone saddles, with compensation set for acoustic guitar strings (two plain strings), or electric guitar strings (three plain strings) .