Well, well...Captain Jay has a beautiful looking new addition to the fleet...Congratulations, Sir...a more deserving individual, there isn't...consider me "jonesing" for more pics!
And the progress on the Carlson is quite outstanding, also...
Very good question!
From the limited research I have done and my general understanding of an I/O set up, I have come to the conclusion that all things being equal, the transom and the motor mounts/stringers, etc. being solid, all of the driving forces of the are basically equally spread throughout those mounting/attachment points, basically negating the need for "Knee" type stringers {gusset shaped connections between the transom and the stringers}, such as might be found in the design of a bass type boat with an outboard engine...
Like I said, that is my understanding...