Didn‘t read the route description thoroughly enough, just blindly followed rusty pegs and ended up traversing much too far to the left. Finished aiding up R17 with loads of rope drag. Stupid me.
Hasn‘t seen an ascent in a few years. The lower part can be climbed freely, but I soon decided to pull on the draws, then stepped up the aid game with a sling to step into about a third of the way up. Didn‘t require any tricks, it‘s basically just workout. And on good gear, too! Has been equipped with glue-ins, in addition to the rusty rings (and those were already replacements for even shabbier stuff). Felt a bit easier than Astronautenleiter, probably because the latter is steeper for a longer stretch.
Funny little aid nonsense with a rope pendulum in the middle. Freed the start up to the pendulum (easy) and the section from the threaded shoelace up to the last bolt, I would say that amounts to 8- or so with some powerful moves into the crack, then a nice hand crack with good jams. Getting over the last bolt is probably at least 9-, no footholds at all in the right wall and no more jams. So all in all something like 7/A0 or 6/A1. Astonishingly overhanging and you definitely need cams even to aid it. There used to be two additional pegs somewhere that are now gone, according to the Buchner guide.