the Orca's season might not be over.
I'm sure you know but noobs may not. It's perfectly OK to stack underquilts
and the Orca is a great candidate to add some degrees to the setup at a good weight.
Another use of the Orca is to shift it down toward the foot end and wrap the side you feet go to.
I've got 3 of mac's IX UQs and need to remember this advice for myself!
The only problem I ever had with IX is its stuffability but we knew that from the get-go.