Good deal on the ras. Dados should be fine. As mentioned, be sure the arbor nut has enough threads on the arbor.
I've had a number of those saws. You might look at the bottom of the motor, and see if the flat area, has 2, threaded holes. On an older CM ras, which has the holes, I bolted a shop made mount for a router. The router hangs off the motor, opposite the blade, and can stay attached, when using the blade.
Another great addition, is a stop collar, for the post, to limit cut depth.
I needed to cut about 20 1" deep dados in the edge of 2, 2x4's. Cut thye dados in 3 steps.
Gang 2x4's together. Make first cut. Lower blade a turn or 2. Make second cut. Lower again and make final cut to desired depth.
Tighten stop collar to limit cut depth to this depth.
Now cut the rest of the dados. All come out the same depth.
A 20 dados took about 5 minutes!
Good luck with it.