Wish I would have found this prior to modelling out my own version.... Any chance you could upload the step file for this guy. Would love to compare the hole spacing for the front and rear IO. Heck the solidworks or fusion file with the sketches would be nice if you dont mind. I printed and IO plate to check the spacing on my model and everything seems pretty spot on but I'd be curious to compare it to yours.
You obviously have made mounts using this; did you find the port alignment was correct? Any issues on that front?