I get that something as exacting as cad would be hard and your penchant for exacting detail is partially because of small scale inclusions, possibly "peer pressure" and reputation, or just because you prefer it, but again; "nothing".
I have made due with plastering photoshopped images into a collaged image; and later, track other than that to be used on the layout, and even mixing of brands to get me closer to realistic eyeballed measurements of Super O before I had encountered SCARM (which took it all to a new level, thank you). I made a lot of progress with my ideas with just the graphics.
Basically, I think a more image oriented app vs a cad type might a foot in the door for now ( with the SCARM name attached, an ad ) if nothing else.
I won't hold my breath But give it some more thought and/or pass it on eh? Exacting is better, unless nothing is the alternative 🤔