@Andreas Hoelldorfer has been building a 3D printable robot arm. It's making progress faster than mine.

https://hackaday.io/project/3800-3d-printable-robot-arm

His forte is hardware and mine is software. It seemed only reasonable to combine forces. So I asked him to share his Inventor model files with me, and then I imported them to Robot Overlord.

https://github.com/marginallyclever/Robot-Overlord

Here's a quick video of forward kinematics in action.

https://www.instagram.com/p/BE9AE8YIfB7/

Inverse kinematics shouldn't be too hard. Java support for joysticks is shamefully bad. Firmware to connect RO and AHRobot together is definiitely possible.

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Meanwhile I've been spending a lot of my free time working on my own design. It's very slow going. I have the wrist designed to satisfaction and the elbow is working-but-ugly. The shoulder and the pistons to drive the arm backhoe-style is where I'm currently struggling. I wish I had more time!