Hi FlyInSpace! Thanks for creating and publishing this MOC!
I originally intended to get the official UCS model, but that one is very expensive, very unwieldy and a bit underwhelming from what I've seen. Once I saw this MOC I decided to build this one instead. I figure I can get it done for less than half the price of the official UCS by ordering from Bricklink. So far, I've sourced about about 1500 parts so I hope I can start building soon. Once I do, I'll report back with my impressions.
As for now, I've noticed that the parts list on rebrickable is out of date compared to the parts list included with the instructions. Good thing I held off and didn't order those simple nozzles or 1x6 curved slopes right away... Anyways, you may want to update that for those that use rebrickable.