It takes about 5 min worth of work on the D1 rear blade but it can snap on to the D2 rear wiper arm. I used a Bosch 40 713 blade, the 41 913 blade is also an option for the D1 but will not work for this mod. All that needs to be done to the blade is the side that doesn't have the holes in it needs to be ground down to the same height as the rest of the blade.

Here is a picture of the blade. You can see the hump to the left of the center pin that needs to be ground down to the same height as the rest of the blade.
http://images2.carpartsdiscount.com/..._711_40711.jpg

 

ill post a picture of mine tomorrow. i got a regular Anco blade, i think i got 13", i cant remember, but i matched it up with the stock plastic framed one, and traced the shape, and put it on the bench grinder, then touched it up with black paint so it doesnt rust

 

I thought about painting mine but the blade was only $6 and the part that was ground down is covered by the arm so if it does rust you can't see it.