General Jim's Chemical Plant Natural Gas Set Streetview City Modular Building Block Brick MOC Model or Playset with Accessories for Teens or Adults

I was really enjoying this build and excitedly waiting to add it to my Lego trainset, but when I got to the steps where I was building the railcar, I found that the wheel carriages are mounted directly to the bottom of the car, so the car is not able to make a turn of any radius without derailing. The carriages should be on a pivot plate or be single wheelsets so that the car can move around a turn, but as it is now, it's only good for show. Good build, bad mechanics for actual use. I plan to purchase the parts necessary from Lego to make this useable

Parts missing and nowhere near the standard of Lego