I downloaded the pack from post #130 and all of the versions are there.
I had the Z axis sliding part done a while ago because with plastic parts and the router being so far out it was giving me too much vibration when cutting aluminum. Here are some pics of it. For cutting wood and doing engraving the original design is perfect for the money.
The Capture.jpg is a new design made out of steel. I ended up getting all the linear bearings and stainless rods as a freebie so I had to jump on it. The X-axis slider has a dual bearing block and I need to insert another single bearing slider next to it since the Y gantry leg is 9" wide. The bottom horizontal connector between the Y gantry legs is a 2 X 6 steel purlin and the top bridge is the same, 2 purlins split and welded together to make it wider. There will be a 1/4" steel plate welded inside the purlins' ends so that they can be bolted on. The Y gantry legs are 1/4" steel plates and I'm contemplating of having the machine shop mill a 1/8" deep blind hole for the 3/4" horizontal rods, then I can drill, tap, and screw them on.
I'll post the final drawings when I'm done with it. All of the steel parts can be purchased relatively cheap. A single stock length of a 2 X 6 purling can be used to produce all the parts and with plenty of leftover to even make a new table out of it. I'm getting all of the 1/4" steel plate parts plasma cut by my steel supplier for $35, can't beat that.. The only critical deal here is the 60" long rod. A 3/4 drill rod will flex up to 1/8" on that length where a stainless will cut that down to a fraction but a simple solution to that would be to place an additional single bearing support running on top of a L-angle below the linear bearings (with some brushes on either side of the bearing in case some trash ends up on the runner).