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No problem!
I'd always assumed the block was steel, but I've just been out to test it with a magnet and it definitely isn't.
Agree that it's asking a lot of aluminium threads.
frank9755-
I think it's less the threads, more that bolts are rubbish with handling shear force, especially in fatigue. Which when you cantilever a load on it, will inevitably happen. A single stay can take a lot of this stress, it may be enough to attach the stay even higher to still allow some flex in the rack.
chiroshi
Apologies for the abruptness in my original reply.
Yes I am was saying the exact same thing as you until it failed. Was always amazed how one big bolt into a threaded aluminium block could take so much abuse - it can’t. I don’t mind the aesthetic of the support and after looking at various other options like mini nitto racks etc I think it’s the best solution for me as I regularly carry heavy loads and ride off road and ride a largish bike.