Thanks!
Yes I have one, but I never realized (or forgot after assembling it) the back cover would slide away until I just tried now.
As for the sampling rate, I would think this applies to analog only as a range. This is similar to what we do with the Nano (and DSO’s in general) where sampling rate is adjusted to match your choice of T/Div. For the Nano, 1Msa/s is only used from 1us/Div to 20us/Div and at 10s/Div, sampling rate is as low as 2.5Sa/s.
What I referred to is actually in the first post from ESP in this very thread.