Tim, I used to have an SGC2020 with ADSP2 and, like you, found it very good. I also used to have (before the 2020) and Omni VI and if I still had I would have tried to add the ADSP2. However, I have never tried to do that and now that I have the Orion, I have no reason to do so <gr>!! Dick, N5XRD