I've been reading up on the Anchor/Buoy methodology developed by Kevin Frank. I like it so far but I have a question (some questions, but only one now). He states the following: "All TOs are not created equal. The first TO created for a given base table should always be used as the anchor. This guarantees that calculated fields and lookups always "start" from the correct TO". My question is I thought all TOs were created equal. What's the meaning of his statement? Why can't you use any TO as an anchor?

Well technically you could.

It is just easier when you use the 1st TO as as the main one. The first layout will be based off that TO. Also its just easier when you are using calcs, lookups, calculated values, etc and the "evaluation context".