I'm pretty sure that you do not have to dismantle any of the cogs to take the axle out. The FW and fixed side are both with outer threads and outer parts and none protrude inward past that (like a 11th tooth cog on some some multispeed FW's.

Just loosen the locknut on either side (fixed side is better since you have more clearance, but it really does not matter much, also it's not very controllable which side loosens first unless you hold the axle itself, or the other cone but I disagree with both methods- cones can crack, and axles even grooved or with square ending get mashed so hard that it damages the threads) - pry the rubber seal and undo the cone on that side. Slide the whole axle on the other side and leave it untouched (it will be put again the same way and it's best to have one side really tight a cone jammed into a locknut really tight so it does not unscrew or tighten when you hold counter to adjust and tighten/loosen the other side locknut)

And I can guarantee that "three arrow" FW's have no means of removal (except destructive methods told above), and are really bad quality - those cost around 1-2$ on the market around here - > go figure