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The on-board computer clips into place above the sunglass holder, the raised ridge engaging the metal clip on the holder. It is removed by reaching through the hole, disengaging the ridge from the clip and pushing outward. That's easier said than done even normally. With the gauges installed, it will require a flat metal blade of some sort and a whole lot of finesse. I could find no visible damage, or broken clips, but the rear portion of the on-board computer was reluctant to stay attached to the front after I removed it. The tape seems to be working (it's only 4 days so far). Don't put the on-board computer back in before you're absolutely sure the gauges are all working right.