How foolish should I feel

[JAZZCNC]

It sounds like a coal train as the motor seems to be stepping really fast, then at points it moves fluidly, then goes back to rapid steps, then freezes for a second, then goes back to steps.

Doesn't look to be stepping very fast in the video. If you can get a picture of the drives in the control box so can see the micro stepping settings then can work out the correct Steps per setting in mach3. Without ensuring this being correct first then no point doing any thing else.