When is more too much?

Now the question is: when to stop?

Soon I think… but there may be some parts competing, not complimenting, so I keep fussing:  you can see a few adjustments (and another 2 inches of the full square) in the image below.

I have to scan this in 4 parts to get the whole thing, and still managed to cut off at least 1/2″. But did notice until I had done all the careful work assembling the parts. So that is just it for now…