KitchenAid Fridge (kfcs22evms4) Cooling Slowly

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Bought a fridge from someone, they told me the repair man said there was a leak which is why they were getting rid of it. I checked for leaks and couldn't find anything, tried to start up the fridge and the compressor overload tripped a little afterwards. Figured out the low side was going into a full vacuum so I isolated the cap tube (which was completely restricted) and purged it with 300 psi of nitro until what looked like some oxidation came out the other end. I decided to flush the cap tube with one of those flush canisters and ac flush until there was an uninterrupted stream at the other end then purge with nitro afterwards.

I reassembled the the cap tube, installed a new filter, triple evac, and weighed in a new charge. Checked to make sure the low side wasn't going into a vacuum and let the fridge cool down. After waiting about a full day the temp in the freezer is only showing 44 F. I have waited a couple of hours and it seems to be stuck at that temp.

I have a bad feeling that the cap tube is still restricted (not completely blocked but restricted) even after I purged it. I really don't have much experience with this so I'm reaching out for some ideas why the fridge is taking so long to cool down.

[6010fd12]

This morning checked the temp and its at 55 F. I think it might be the cap tube. Does anyone know what the right size and length is for my specific model?

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I feel stupid for not checking earlier but I started the fridge again with the gauges connected. 

After 1 minute:

 

After 10 minutes:

 

 

I think it's safe to say that the cap is probably still partially restricted even after purging the blockage with nitrogen. I need help finding a replacement cap tube.