So I finished setting up all my bass guitars with my new MusicNomad kit (thanks Mr_McBride). Here's the report on the Sires:
The M5 needed the nut slot lowered on the E and A, but the B, D, and G were spot on.
I had the relief on the money already. I lowered a few saddles and got it to 1.75 on the G and 2.25 on the B. Very respectable. As I said before, I pluck hard and slap like Louis Johnson. I don't put up with fret buzz.
The P7 was perfect. I did not have to touch it. It is set between 1.5 for the G and 2 for B. This bass had the best quality from the factory of any bass I have ever played or owned. As I mentioned, I swapped out the tuners for Hipshot Lollipops; but there is nothing else I would change.
On a side note, the two basses I own with neck-through-body construction set up the best. The action on both is below what the string gauge says is even recommended. I don't know if this holds true for all bass guitars of similar construction, but the geek in me required making this knowledge public.
I strongly recommend investing in the kit and files if you are the type of player that sets up your own bass guitars. The nut settings are critical for proper intonation in the lower frets.