1.5 hrs. on the sub-panel mock-up.

Drew the connectors on the boxes so I know what needs to be reachable/accessible.

Initial test arrangement.  I immediately see two potential issues.  If the 45R's position under the sub-panel is already defined by holes in the firewall and it needs to move further left then it could interfere with the connectors for the 245.  The other is the VP-X needs to move left so the connectors on the right side aren't too close to the upright.

Put my panel mock-up in its approximate location.  :-)

Another view.

And yet another...

Behind the sub-panel.

Here's looking up and you can see the potential issue between 45 and 245.