Dave Macleod reports he has done his most difficult slab, Die by the drop, in Glenfinnan. He suggests a grade of E10 7a (~8b+). If confirmed, that would make it the hardest trad slab in the world. All the more interesting since Dave states, „everything went wrong in the crux“ and „I also know I?m an awful slab climber.“The same day Dave climbed the slab, he went to Margalef. Here is a nice video of an 8b and 8c roof climbing.