A couple more updates sorry for the bad pictures
Drilled backside holes out to 1/2 inch to allow bolt and ratchet to be put through from the back. Im thinking I will just order a bunch of plastic plugs to put into these holes once I am done.
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I threw a couple bolts into one of the linear rails just to see how things were coming together.
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So far I am pretty happy with how the build is coming together. Time will tell if I have some precision/accuracy when im done...

Here is a ~bad video of me test running the used colombo 10hp ATC spindle that I got. Running it at ~18,000rpm after running at ~8,000rpm for 10 mins to get the grease moving in the bearings.