A guitar tech I just met has an original EH EM like you are talking about, not the DEM, and he told me that I could borrow it to see how it sounds. I have a DEM and I wanted to compare them. I have a TF and a PF, but no MF.
If anybody in the Toronto area has a MF and would like to come out and see me in Pickering, we could compare them.
I also have a reissue MXR flanger (gray 18V) and a block logo Phase 90 that I would like to compare to the MF. My hope is to be able to get a MF and get presets that are reasonably close for for all 3.
I'm nowhere near Toronto, but I'd be extremely interested in this sort of information. I have an original gray MXR Flanger (wall powered, no batteries or adapter), but no time to really figure out proper MF settings to replicate its sound.