I don't think the firmware on the Tbolt makes much difference in performance.
(The older firmware even has a couple more features in it).
Units with the 3.0 firmware are newer and have a much greater chance of having
the poor temperature sensor which definitely has a bad effect on performance.
If I had my choice of two units (both with the good oscillator) I'd definitely
pick the older one.
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-There are several cheaper ones for sale but make sure you get the 3.0 firmware
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