In typical group mode, this topic is going over the top.? 99% of users can receive the radio in the mail, back up the card (especially the cal data) and operate.? IF a day arrives when the machine doesn't boot, swap the card and carry on. Done.
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The mathematician will never get to 100% reliability. I'm with the engineer mindset - pulling the plug on the zBITX is close enough for all practical purposes.
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