Wow thank you for the list! When I saw your post I immediately when out and Bricklink'd some additional rails since they are hard to find. It was one of the few parts I got the amount on the parts list. I got extras of almost everything else.
Although, I have found the instructions frustrating, the model is pretty incredible using some ingenious techniques for changing stud direction. (The use of multiple headlights in red was one example) I have come to believe that some of the odd parts and colors came from what was on hand when it was built and the instructions show that. I have in a some areas simply chose the best technique used and made it symmetrical when possible. There are some areas where I replaced multiple parts with one part to simplify and strengthen things.
I think I have extras of everything you listed, hopefully. Your stand is awesome. I had started to duplicate it in Stud.io from the pics you posted to see if I could figure it out. If you would be willing to share your file that would be awesome!
My hats off to Cavegod for an amazing model as well as Brick Moon and Henry Han for the hard work on the instructions.