Doh! After getting half way through, and making lots of parts, I find out there is a shrunken down Mega2560 R3 Pro Mini cheaper than buying the separate parts.
In the end I scraped the separate elements because it just makes it confusing when one part is all over the place. They had the LM358 as one op-amp at the top, one at the bottom, and the power to it on the left side.
Holy c@rp! I’m sure the FZ writers knew what they envisioned, but finding more complicated stuff makes you feel like you know nothing.
There is a ATmega2560 chip that has 100 pins in BB and PCB, but in SCH only has 88-ish. The odd thing is that there is 100 pins in the FZ Edit Connector box that are all assigned, but only 88 in the svg. More delving of the svg and I find pins on pins, but with zero stroke. Somehow they assigned everything in code, because FZ certainly won’t let you do that in the graphical editor. They are common pins, but it seams a bit odd that if they aren’t in the SCH they don’t seam to be connected in other views, so you have to connect them there.