GB's instructions to put together the new screens:
1) lay screen rails out, upside down
2) insert tensioners into rails as per instructions
3) insert metric nuts into rails... they can be worked around a corner afterwards, FWIW. The instructions I have shows a couple of the nuts in place (in the correct slot) but doesn't actually tell you to insert them.
4) insert corner plastic pieces and assemble frame rails
5) fiddle endlessly with arrangement until you can get the screws through the holes in the frame rails and into the plastic corner "L" pieces... this was the most frustrating part for me. I ended up having to slightly open up a couple of the holes in the aluminum rails to get the screws to be seated. The included washers go with these screws, which is a good thing as you might need to make the holes bigger
6) insert metal rods into screen, carefully. Lie screen face down inside of frame rails, black side up. tension screen... do not over tension, just enough to get rid of waves.
7) collect plastic bits and arrange around upside down screen. Each piece has a thin edge protrusion which can be tapped/rammed into the very thin slot at the outside edge of the frame rails. The two long and short pieces are not quite long enough to actually reach the corner pieces, but the corner pieces have some 'overhang' which will reach the edge pieces provided the edge pieces are reasonably centered in the frame rails. Tap/Ram pieces in place. Be prepared to do much retapping as pieces tend to 'bounce out'.
8) screw four metal corner pieces/wall hangers into place, using the metric screws which match the metric nuts you previously inserted into the rails... three screw per wall hanger. The screws are the correct length if you use the plastic pieces in step 7. Two of these hangers are used to actually hang the frame, the others simply hold the corners together.
9) get some decent wallboard hangers... the included ones are crap.
FWIW, the 'velvet coating' seems to shed somewhat. It makes a bit of a mess, and I was glad that my screen was one of the beaded ones, as it needs a good wipe down afterwards. I don't know how you'd get a beaded screen together with getting black stuff all over it.
Overall, the screen is still a tremendous value. IMHO. Just be prepared to fiddle a bit.