For adding the title, I use 1.1 as the cannon coefficient, making the new non-joust-coefficient 1.1781.
The M3-A title is unique (not in the game sense) in the sense that if you take the title you know that you will be filling it with a cannon. So you don't need to add a general utility coefficient for the cannon, you can directly analyze the jousting numbers with whatever cannon you opt to install.
If there ever were an explanation for why these ships need a cannon, it is this right here. Every ship is within a point of the calculated value or above. Tansarii point veteran and A'shera inch their way above the spacer this time around, but all are good value depending on how much you want to spend on your scyk. *Keep in mind, the assumption for range 1 is that the scyk will have an alternate HLC shot, which is an optimistic case as the scyk's primary gets only 3 dice at range 1--mileage may vary*
Some of these numbers are suspiciously close to their printed costs, which has me wondering if someone at FFG started reading this thread.
I'm sure it has been read and referenced, but I didn't post MathWing 1.0 until early 2014, so wave 7 may be the first wave that they could have used the method before the design got locked in. And I don't know how comfortable they would be using someone else's formula that they didn't create or fully understand, let alone be able to manipulate into using for new ships.