These guys had an 18.5mm version of this bridge:
http://bit.ly/2xJEYo for a while and I snagged one to put on an SX dual-soapbar model. The problem I had was that the neck on the SX wasn't quit wide enough at the very bottom to deal with the large string spacing and the outer strings were right on the edge of the neck. I went to an 18mm and was much happier with it.