The 113. ....# is the model #
I did as you did. Send in motor for $100. (Actually 12+ times)
The big difference in what I did, was that I bought a much better ras. Mine is a Dewalt 7790, 12" saw. A world better than the CM.
For the price of a decent ms, you can buy a good old Dewalt, or Delta ras, that do a lot more than a ms, or scms.
The difference in a CM (even the better older ones) and my Dewalt (and older Delta's) is huge
I kept my old saw, until I made a table for my new one.
You can always turn in the CM ras later for the $100.