I'm not 100% sure that an OFR can be easily retrofitted. Not because of the routs, which should be fine. However, the studs go into some kind of metal plate that sits below the trem, and I'm not sure if this would be a problem with an OFR. Probably easier just to put a Tremol-No on the existing trem and set it to dive-only. BTW, I paid $599 for mine, to answer an earlier question.