Gile,
You seem to have a very good understanding of the coordinate system & the use of trans.
It would be beneficial to me and a number of folks here if you would share that knowledge in a
separate post of even an article on the subject.
Especially, "when you need it" and what commands & function need what type of trans.
I know that is a lot to ask as that type of post is very time consuming on your part, so if
it not something you have time for I'll / we will keep learning from the code you post.
Thanks for your examples.