Giant 20' x 3' x 2' router build

[EddyCurrent]

Thanks for the suggestions anyway


so what do we think the next step is? Run a 3 core wire and try that instead of having them all together?

That's what I suggested earlier but using single core wire. Capacitance acts like a time delay and that's what you are getting.
Better still use a piece of CAT 5 twisted pair, it's imunity to noise is good.