I got now both players, 1.5weeks after ordering. The Fiio M3k runs ok with the one rockbox release which was ported, but seeking forward/backward is for me just with default firmware working - it's dualboot, so installed in parallel.
The sansa was apparently shipped from Singapore, the foam cover of the earpieces did fall apart immediately when unpacking, I guess they have a warehouse somewhere around with the sansa. Curious now to see rockbox/sansa, as it has full support.
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