Stop Breaking Down was famously done (& probably written) by Robert Johnson in 1936/7 & has been covered by many bands including the Stones. As far as I can tell RJ played it in B, although that may be wrong due to differences in speeds between different recording & playing systems at the time (1936/7). There's a bit of slide right at the end of the RJ version but I think the song is played without slide.
I play it in A in standard tuning with a bit of Steady Rolling Man crow-barred into the main riff. I don't know how that got in there but I reckon it works.
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