This is a fantastic mod!

But there are some basic things I don't understand, and they are not explained. For example:

What is "Main Product"? Or more specifically, what does it mean to set?
What is "Excluded Product" used for?
You can link and unlink intermediate products. What does that mean and what do you use it for?
I have a production block where one of the Products are marked red. Why is that and what does it mean?

hello, thx
Main Product and Excluded Product can use to help the normal solver take only main product to compute the recipe or with exclude product no use it
if you make a block that make red circuit en the second recipe the green, you can link the intermediate (green) to use it from the previous block.
when the product is red, it indicates that it is in excess