Having tried unsuccessfully three times solo, with no German language skills I want to congratulate you on your summit visit! Your trip report and photos were authentic and you clearly earned taking over the Grauspitz page. The fog was a problem on 66% of my visits to the area too. Like you, I could not make it to the gondola down on my last trip so I slept at the top. It sounds like you had a challenging but thoroughly fun time. Again, congratulations! Chucky
I am also happy, having read the tales of defeat before. Way to go!!
With your advice, I finished my trip to Vordergrauspitz a few days ago safely. However, instead of descending back down slightly from Hintergrauspitz, I descended almost 200m back to the southwest valley and shot up directly to Vordergrauspitz, simply because the the southwest face of the valley at higher level is too steep for me and I can avoid the dangerous bit of ridge your mentioned. Anyway, Good job! Taking the ridge should be even more interesting, and it is possible when you are not alone. Well done!
You are very welcome, I'm glad you had a good time. Good trip report!