I installed a Passport 9500ix using BlendMount (P/N:BBE-3030) and MTX Series Mirrortap (P/N:MTX-1015), using the DIY Radar Install (from Giulia forum) page linked below. Taking off mirror trim pieces behind the mirror was actually not difficult. Using the Mirrortap wiring is the quickest and easiest way to hard wire radar detector. I highly recommend using the BlendMount and Mirrortap.
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“Imagination is the beginning of creation. You imagine what you desire; you will what you imagine; and at last you create what you will.”
George Bernard Shaw