@jea48 thank you for the added input. A couple of things with a question(s) added:
About my breaker arrangement on my panel:
I typoed again in previous post. There now are FIVE breakers on the leg I used for the 3 circuits I just added.
From the top working down
1) I discovered what the unknown breaker was for. The washing machine. Which I assume is a pretty hefty draw? However, I am relatively confident that the machine is usually not in use when I am listening. So that should be good?
2) In my previous post, I said "TWO of the three original dedicated circuit breakers were on that leg"; in reality, only ONE of those breakers is on that side, and when I finally reach completion up in the attic it will be very rarely in use. So that should be good? If not, I can turn that and the washing machine breaker off when listening.)
3, 4, and 5 are my for the new and truly dedicated lines that I ran directly from my outlets, up the wall, across a section of the attic, and down into the panel.
Besides the sub-questions I raised above, 1) would you say that what I have described make that a pretty good leg? 2) Especially if I turn those other two breakers on the leg to ’off" when listening? 3) And is there any need to do that if those circuits are not being used when listening? 4)And would there now be a need to move my three new breakers down?
(I guess that was more than one question.)
On the outlets: thanks for providing that, and I actually did buy some of that brand at Lowes.. I know because I have a n extra one. The back strap is magnetic. However, I also have them mixed & matched with another brand Lowes sells (I don’t have the box on that one), and it has a magnetic back strap as well. I am pretty sure that they are different brands as there are small differences in their construction. I can easily go to Lowes & finish up this job by buying all one brand.
Anyway, thank you for your helpful input.