1. Pertaining to the fontstructer AFT:
“Typefaces made in 2012 at FontStruct: […] AFT34 Neuromicr […]”
I was sent "testament_34__neuromicr.ttf" by 'AFT' in late 2016;
it features 2x4 glyphs designed since 2010 (but released in 2012).
My last private and related message from AFT dates 2016-12-25 :-)

HAPPY XMAS AFT!

• Old profile of 'AFT' (2010-02-01 till 2015-07-21; almost all its fontstructions got unshared from the great catalogue by himself, for “copyright concerns” he told me - a dozen of artbooks still to be released or/and in progress or/and by request);

• His new profile (since 2014-06-17; another small selection; 'AFT' probably left FontStruct on 2016-02-10, I'm not his biographer).

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2. About "dpla's possible too (2x4)":
• you made the uppercase 2x3 too (unlike AFT's 3x3+ design);
• you surrendered before adding the numerics, at least (AFT's are 3x3 again);
• no punctuation/symbols, all right!

NOW IMAGINE a complete US-ASCII (94 unique glyphs):
It's possible too (as I did on May 2013, with a fair-to-bad legibility)…

= Extremely difficult Latin design, compatible with striped-RGB, fair learning curve, included in my typeface (family as a future script), worth thousands of bucks/euros (if I were to sell it, compared to the extremely short and unusable trials the web still shows)…

I suggest you try again (and/or complete) from these safe 2x4 candidates for a serious font… ;-)

{I think, honestly, that my derived 2x5, the one that has all his glyphs stretched to 2 dots of width, is incredible/beautiful, and still a lot more legible than as 2x4. A pity FontStruct does not have some pools of speciality… 'extremely low-res pixel fontstructers', in this case, where Groszak is rather skilled, don't you think, the new generation?}