The image of Sierra-2 that's on http://www.ascendacoustics.com/pages...SRM2/srm2.html seem to be already with RAAL, if so, what is the [Sierra-2 upgrade kit] for?
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The image of Sierra-2 that's on http://www.ascendacoustics.com/pages...SRM2/srm2.html seem to be already with RAAL, if so, what is the [Sierra-2 upgrade kit] for?