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Jazz is pretty well known and well regarded ..
Whatever You buy from him will work and be a very good compromise for 10x less money than the big names in the field.
Imho.
I´m not his friend or...

I will be happy to try ..
Using Rhino I can open obj models, at least an online download of Ironman, 16 MB, worked fine.
Using an industrial PC with Nvidia graphics and 8 GB RAM on the graphics...

Further, drill-rod as barrel, drilled and reamed and a secondary drill-rod as the endcap pressfit would likely cost about 2$/unit qty 3000.
Advanced lathes run 250$/hr and should put out 240-300...

A peen, aka pin punch on one corner of the flat blue bolt flat area will mostly lock it in place.
This can be done in an inside-supporting fixture, think fork, avoiding distorting the U shaped hold....

The link does not go to the company in question.
Why not ?

Base salary, pay, benefits are not indicated.
Nor qualifications, or skills, desired.
Nor nr of positions.
Why not ?

I have...

There are exactly zero limits.
Dan Gilabert made a 1 micron lathe.

My lathe has 1 micron mechanical resolution and positioning ability.
It is not natively accurate to 1 micron, but I can move by...

You will probably dislike my advice ..
Which is unfortunate, since it is excellent and will help You a lot.

All, absolutely all cnc and mills/routers/machines depend on rigidity.
A common error...

The better A. is that it depends.

By mass the alu is 3x less rigid - and importantly it likes to ring and vibrate.
But when you get the same mass in alu, it is thicker, and thickness scales pwr 3...

There is also probably an additional error .. I would expect 95% or more likely to exist.

If You have std BK/BF mounts .. they are one source of your error.
Std import mounts have no preload, and...

As the others said..
buy nothing more for now.

Try it, learn, the sw and jargon and endless stuff related take lots of hours.
It is much better to learn with a cheap kit machine.

Because you...

Excellent start !

One point.
A tiny nema 23 stepper, on my machine, moves my bed mill, effortlessly.
The bed is 1600 mm wide, 60 mm thick on ribs, tool steel.
Mass is 200 kg, with upto 200 kg...