When searching for parts that go together, for example an automatic transmission. The new UI does not work. Here is the same search on the old UI, it has all the parts that I am looking for. When searching for wheels, first you have to search for the wheel slot in the main search bar, and then search again in the secondary search bar for the wheels you want. It would be more convenient to allow searching for the sub-part in the main search bar. Here are a couple of edited images of how it should function. Searching for specific wheels: Searching for something that has multiple parts to it, like a transmission:
