Expanding the Longer Ray 5 laser engraver / cutter

We've recently taken up running a laser engraver and cutter for some small (ish) projects but really needed it to be a bit bigger than it was. This video is showing the ENTIRE process in real time as I go in blind and "figure it out" along the way. A condensed video will be uploaded soon.
Entire parts list:
2020 V-Slot aluminum extrusions: www.amazon.com/dp/B0B8V6K363?...
6mm Timing belt: www.amazon.com/dp/B07BRKZGMS?...
3/16 or 5mm steel rod: www.homedepot.com/p/3-16-in-x...
3" wood screws: www.homedepot.com/p/Grip-Rite...
Wire, solder, flux, shrink wrap. 9 conductors, 22awg.