There's a bolt and a threaded bushing, with no notches to keep it from turning with the bolt. That's where you'd need two allen keys (the bushing takes an allen key too).
Apologies, makes more sense now, I didn't know there was a threaded bushing, unlike the Alter.
With the method I'd envisaged you using, and the threaded bushings in place, four allen keys would be required simultaneously, haha!
There's a bolt and a threaded bushing, with no notches to keep it from turning with the bolt. That's where you'd need two allen keys (the bushing takes an allen key too).