This one was spotted and sent in via Soviet Space Child.
via this auction
"I guess 50 (60?) of these were produced, either as kits or assembled products. I bought this to complete my own rack full of Grant Richter modules. It was a largely an impulse buy fueled by the tingly feelings my Wiard 300 modules give me. Make no mistake--this is NOT a Wiard module nor does it sound like one. It is not nearly as awe-inspiring overall, though it does have a few tricks that make it worth exploring. Definitely a cool piece of synthesizer history.
I found this to be, overall, one of those "sweet spot" machines, where nuanced wiggling can give you some really unique and impressive sounds. This is particularly true with the bandpass filter, which really sounds like Satan yelling about the weather while contending with a head cold. Very cool. 
There are a few peculiar aspects to this, such as the weird gain staging. Any setting after 12 o'clock in the VCA will saturate/distort. Maybe you like this. I don't care for it personally. That's just the way these things work, as confirmed by several other owners, as well as Cary Grace, who currently builds all modules under the Wiard name, and who tours with an Evenfall Mini Modular (largely because it's small and light, I guess). This is a very lightweight synthesizer. The pots are all mini pots, like attenuator pots on lots of modern Eurorack modules. I'm a bit of an oaf for these, but they're not difficult to work with.
I have not opened it to check internals or perform any mods. I'm not sure whether there are schematics floating around, but if you choose to go that route I'm sure you're an intrepid enough lad or lass to chase them down.
Cosmetically, there is some damage on the lower right edge of the panel; I have straightened this to the best of my ability.
Their words (copy/pasted info from around the web):
The Evenfall Mini Modular Synthesizer is a rack mountable semi-modular analog synthesizer featuring the warm, organic sound of real analog circuitry and the flexibility of individual control knobs and a patch cord interface.
The Mini Modular also features internally "pre patched" or "normalized" connections among the modules. These connections make the Mini Modular a capable synthesizer even without inserting patch cords. These internal connections can be overridden by inserting 3.5mm patch cables as desired.
The Mini Modular can be patched to make sound by itself or in conjunction with another voltage-controlled synthesizer. It can also be controlled from a MIDI controller via the built-in MIDI to CV interface which provides pitch, velocity, gate, pitch bend, portamento on/off, and modulation output voltages.
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This synth was designed by Grant Richter of Wiard synthesizers and there were roughly 60 sold, 30 in kit form and 30 assembled. The previous owner told me this is a factory-assembled unit.
Grant wrote this on the old Wiard Yahoo list:
"That is a great little instrument.
It was originally slated to be the Wiard Model 3600, but I decided to pass on it because we could not find knobs to fit the little nubby pot shafts. They are just like TR-808 tuning pots. I feared the lack of knobs would limits sales too much.
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