If you still have problems compiling, look under File/Examples/MatrixMath/MatrixMathExample and compile that sketch. It has a call to Print

do you have a duplicate, more than one MatrixMath library installed?

I've compiled the sketch on both a Mega and Teensy 3.5. No problems. Have you installed the MatrixMath library? If so, check in MatrixMath.h for the Print function prototype. If its not there, you have a different library to the one I have ( https://github.com/codebndr/MatrixMath )

I've uploaded the sketch now.

I've uploaded the sketch, control application and some test files to github hugo-source/AR2-source.... cheers

I need to do some more testing, then I'll put the arduino code + my control program + a pdf description onto github. I'm currently integrating a servo gripper that doesn't interfere with the calibration.

Do you have an arm built that you can use? Do you know how you want to use the software?

Hi... the software is still pretty raw. Not a turnkey system like Chris's. I'm currently developing the control program which integrates the MS scripting engine. I can run my arm with VB scripts which gives it a great deal of flexibility. I'm OK with sharing but I've had to change some of the calibration parameters which seem to be incorrect. Need to start a conversation before I'd be happy to release the software... cheers

try https://nutandboltshop.com.au/ They have most of what you want including the set screws. Nothing's cheap though. This is a high cost country