not the best weather on Heilbronner Weg trail from Rappensee hut to Kemptner hut. But we did not miss the short sidestep to climb Maedelegabel
I used the mountain bike to shorten the approach for a long day's climb: up northeast ridge of Trettachspitze, down northwest ridgde of Trettachspitze, passing slopes under Trettachspitze, find a ramp leading right up to the north ridge of Maedelegabel, traversing Hochfrottspitze to Bockkarscharte, finally down to Waltenberger Haus / Einödsbach. You need to be moving carefully in this partly rotten rock, but it's a nice climb never exceeding UIAA grade III.
We left the car at the Fellhorn cableway parking site and hiked via Birgsau and Einoedsbach to the alpine hut "Waltenberger Haus". There we left parts of our luggage and hiked up to "Bockkarscharte", crossed the small (and only glacier of the Allgaeu Alps) "Schwarzmilzferner" and climbed the normal route onto "Maedelegabel". Thats about 1750 meters ascent in about 5 hours. Back to the "Waltenberger Haus" where we spent the night in the absolutely overcrowded hut (about 45 centimeters width of mattress for every sleeper)!
Next day we ascended again to "Bockkarscharte" and walked the Heilbronner Weg to "Rappenseehütte".