Tools Needed:
Rivet Gun
1/8 x 3/8 Rivets (x2)
Wiper spoiler from early Honda Accord
Drill
1/8 drill bit
I didn't take any "during" photos (my bad) but it is very simple to do without any.
step 1) Line up the spoiler on the Legacy wiper arm as shown in the picture below. As you can see I chose to put it right at the end of the thicker part of the arm.

step 2) Mark where you are going to drill on the wiper arm (I did this by drilling through the wiper spoiler hole while holding it where I wanted it). Drill all the way through the wiper arm
step 3) Repeat for the second hole making sure the first one remains lined up. Easiest thing is to put the first rivet in already.
Step 4) Mount your new wiper arm with spoiler to car! Yep it's that easy!




Fits perfectly and doesn't interfere with anything. If you are able to I recommend getting black rivets. Now you will be able to see in the rain without having your wipers skip or chatter!
I will make up another arm one day and take some "assembly" photos.
cheers