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You lucky b....
Leave the small one in, yank the big one out.
Nice that i do not have to explain more as the physically small is also capacity small.
Reason for it being, the small one seems to be M-SATA only, so it will not work on some normal mainboards, while the big one works on anything with a normal SATA connector. Or you can buy an external case for the big one at usually 7-15$ (insist on finding a USB-C or USB 3.0) and use it for whatever you like, even installing LinuxCNC on it and testing any PC you come near to, since Linux boots from anything and on anything (well almost, for me 99% of the time)

Focus is a bit off but it's exactly the same as mine. If you disconnect at the elbow you will see what I mean about the tube going to the rotary joint being free to spin.
The way they are set up means you couldn't extent the Y quill for a special machining set up as the elbow would jamb on the rear of the Y slide.
Maybe you could shine a torch down the hole to see if there is anything else stopping the tube pulling out with the quill.
I haven't had a chance to figure out if there is an anti rotation slot and pin on the quill. You have to remove the one on the Z quill to remove that quill.
Cheers,
David

Just got my BRIX i7-7557 delivered and I pulled it apart to just look inside as the listing said 256gb SSD. Well it has 2 SSDs, one mounted to the board and the other mounted to the back cover like normal. Both of them Samsung with the small board mounted one being 500gb and the cover mounted o e being 1TB and it’s an 850 EVO which shocked me. I only paid $110 for this computer and wasn’t expecting this much coin in SSDs to be inside. 

what do you recommend, pull one and just use the board  mounted SSD ok keep them both? Seams kinda over kill to use such a nice SSD for just LinuxCNC QRplasmaC.
Thank you for any advice you can provide on setting this up for optimal performance.

Trial photo Kind regardsChris 

you mean if a analog value is above X = High, if below = LOW?

The hardest part of working with the parallel port is getting the latency down as you have 2 threads going and the fact the base thread is usually 25000 ns for decent stepper speed .
With a mesa setup you only need a servo thread running at 1ms. Getting the latency right is far less work, usually it's good right out of the box. You'll find you machine moves more smoothly, due to the stepper signals being generated by hardware.
It's all plus plus, mesa is well supported on the forum, Pete is an absolute gent, mesa products are rock solid and quite expandable via their Smart serial interface.
I know most people on the forum will recommend Mesa, but the thing is they are that good.

Glad to hear you're up & running.

Cheers
Rob

Brilliant!  I just had GMNOCCAPY up and running for hours without a glitch after making that change.  Believe you nailed it.

Thanks for the great tip.

Jeff