Hi, I’m new here, got a Mod Dwarf recently and this is my first post.
I just got a Beats and Bars E&F2M adaptor (like the EX2M but with additional footswitch input) and can happily say yes, it worked, straight out of the box. I connected an expression pedal (Boss EV30) to it and into the Mod Dwarf using the USB cable supplied with the E&F2M and could immediately map the output as a MIDI controller. Mapping is smooth and responsive. Have yet to try footswitch which is on order.
By the way, as this came up before, Beats and Bars do say that their devices are USB class compliant, but it’s buried a little in the small print.
It happens to be smaller than I imagined from looking at the picture, very convenient size. I ordered it on Amazon and it arrived in the UK (from Poland) in 2 days - a day earlier than the earliest predicted delivery date. So, very happy with it (have only just got it though - will report back if any issues).