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My experimentation with OP25 / RPi3 / 4 have run its course. I wiped an actual PC (although it's a NUC) and installed Ubuntu 18.04, and OP25 with few issues (although the box used to have another flavor of Linux on it that destroyed itself during an update.) My question is how many instances of OP25 can be run simultaneously assuming there are enough resources? Is there a limitation? Can you assign individual SDR radios to each instance? I'l trying to decide if I want to invest in individual NUCs (or other USFF PCs,) or just build one massive machine...