Got some more work done. Thinking I should have started with a dozer for my first build. I learning things to do and not to do lol I'm still not sure what I'm going to use for pins and bushings I wasn't able to buy a lathe yet. Been looking on McMaster Carr and I think I'm going to use 3/16" dia stainless steel pins with clips on both ends.
Trying to keep around the 1:16 scale because I really want to build a 3.5" gauge train for my yard. Here's a pic of mock up with earth magnets holding it up.