Brian, I believe those changes to the loops put too many tracks out of reach for Mark, but I could be wrong.
Mark, that said, here's what I've come up with.
-- I reduced the size of the lower loop, but I'm not completely happy with the front curves being so close to each other. I've seen layouts where the lower loop is covered, but left exposed for viewing, not sure what you think about doing that.
-- I also fiddled with some runaround tracks in the yard, but I wasn't sure how they're supposed to be configured, mostly just food for thought.
-- I also changed the spur in the right loop because changing to 36" shortened the spurs a bit.