There are fewer tabs in tot-lots than in other areas, at least in my experience. I was experimenting with the DISC, running below "4" at times. This is about the iron cutoff point, and so the paper clips appeared when I ran below that mark. A few bobby pins and bits of steel wire made an appearance, too. In the end, I kept to the IRON preset for the most part. This detent switch position brings you into the DISC range at about "4" cutting out most of the iron. BUt, occasionally I would switch to low iron just to verify a few of the pop's and clicks I was getting.
Thats something about the 1200 series detectors, they discriminate iron with a pop or click. Most non-ferrous trash is cleanly discriminated out, but iron gives the characteristic "snap-crackle pop" these untis are known for.
The lack of "mid range conductors" as you put it is coincindence. So were the quarters... just one of those things. Since you never can tell what will be where, you sort of take iwhat you get. There were also snap closures from clothes, zippers pulls, pencil erasers, metal buttons - all mid range items. You see some of them in pic 1. SO, the midrange targets were there, just not in the form of gold rings!
Thats the nice thing about this sort of hunting - you set it and forget it. I switch to IRON preset, set my SENS and recover everything. I dont spend much time in analysis of signals, nor do I look at the controls much, other than to make sure they are where I put them from time to time. I'm covering ground an scooping targets!