Full credits to: https://www.thingiverse.com/thing:2893293
The t-nut/t-track wasnt the right fit for a Dewalt saw (specifically Dewalt DWE7491-XE)
So I made my own to fit. This may well work on other saws which have the follow dimensions for the T-track:
Base: 22mm
the height of the base: 4mm
The thin bit width: 19.2mm
height of thin bit: 5mm

Printing: Anything you really want, I just did it at 30% infill so it has some strength.

Hole fits the M8 nuts