Was out biking today when I noticed the pedals were moving side to side, with the pedal arm almost coming off the left side. As I was investigating the washer with "LH fsa AL" actually came off in my hand. I re-installed it and tightened it up by hand, but obviously its tight with a big gap between the pedal arm and the bottom bracket now as below.
Is it simply a matter of removing this washer, pushing the arm back towards the bottom bracket and tightening it? And if so what tools do I need? I've got allen keys, screwdrivers and various other general tools, but I haven't got anything with 6 holes like it looks like id need to remove it. Thanks