I understand. I was disappointed the moment I found there was not a way to align a round part to a slot. I would think that would be a basic need. The more I look at this the more I see the need for other tools to find the underlying problems.
I will post a video on what I did. Mean while would you send me a zip file of the folder you have these parts in? I'm going to try to make this file work although the screws will have square heads. I accept this challenge. What is this project for?