TL;DR - Yes, CAD questions are on-topic for the site.
Your question has been pretty well addressed before, and Trevor's answer along with my answer provide more detail as to the community's expectations regarding CAD based questions. They are certainly on-topic for the site.
Within one of your comments, you expressed concern that the answers weren't valid as one of the subject questions in that meta post has since been deleted.
For the sake of your question and others who don't have privileges to see deleted posts, here's a screenshot of what was asked:

List and off-site resource request questions like that one aren't a good fit for the StackExchange Q&A format and our policy is to close them as off-topic. The general concerns are that the information grows stale and questions like that are honeypots for spamvertisements that don't provide value to the site.
So don't worry about the particular example that happens to have been deleted. Read and follow the guidance presented in Trevor's and my answers.