Thanks Wiscampsin! Was finding so much info on stringing and none on hanging. Didn't realize there were little holes in the string anchors. The rubber bands made all the difference too. There is definitely a learning curve. Finally got 'em up. Have to say I do like the fishing line better than the day/night string. It's thinner, only about .45 mm. but really strong and it's easier to slide the shades. Many years ago when I was mtn biking a lot (and deficient in minerals I think as a result) I actually cracked a rib lifting up my night shade. Really awkward when you have to lean over the sofa to open a blind.
So thanks for all the input.
Also, was going to mention, in case anyone else has this problem. Under the middle rail (at the base of the night part of the shade (on shades where you pull the night shade down) there is what looks like one blade off a metal/plastic Venetian blind. It runs through the bottom the full width of the rail and has holes through which you run the string down into the day shade. On the two blinds I use the most the string broke through that clear plastic micro-grommet on that blade and started pulling inward, tearing the day shade a bit in the process. I looked everywhere -- no one sells them individually, not even "fixmyblinds.com" but I discovered that you can take some pliers and just rotate that little grommet around so it's facing the side of the shade instead. I did that and glued it in that position. Then I cut off one full pleat that had the most damage (of the day shade) and reattached it to that blade by just putting a little quick-drying glue along that blade and they look great. Like new. My rig is 12 years old and those two started tearing a few years ago.