I have a couple of 1-20 Bachmann Shays and they come with a large bag of accessories. Most of them are obvious tools and I've pretty well figured out where (more or less) to put them on the engines. There are a few items that I have no clue to what they are: On the far left, the spring looking thing and the two longer Black wedge looking plastic pieces. They almost look like chocks. Any ideas on what these are? I have looked all over the internet for answers... Thanks for your time.
Charles