Here are the dimensions for the mounting holes. Altitude is testing the prototype, I have PCBs available if anyone is interested.
Testing successful! All good. I’ll post some pics and video shortly. Ilmenator brought up the point that the 4 buttons and LEDs dont have an official function yet so this might be a good time to discuss that..
I think one button should be a preset for the “Magic BPM” 
ill take 2 of the pcbs - thx.
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So this is the result: The way this is hooked up is My SEQV4 hooked up to the Aout Euro module via D-Sub, the euro module is powered by the eurorack power and has a SRIO out connection to the TPD. 5V is generated by the Aout Euro
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Love the squared led matrix !
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adafruit stocks a bunch of different ones in square
Beautiful!
Yes, that looks very nice.
The LEDs are singing “It’s hip to be square”
Nice! Do you have acrylic windows installed/planned?
They are installed. Gray tint, it hides everything but the illuminated stuff