Would somebody be willing to try/buy this?

I know it's not practical in your situation, but I think this ^^ looks better...

 

I totally agree. I wish the washer nozzle was somehow mounted to the wiper arm like some other vehicles. I know you don't use your rear wiper, which is why you removed it. I use my rear wiper all the time, so disabling the rear wiper nozzle and removing the arm isn't an option for me.

 

I should also add the color match is amazingly good, normally silver and whites are difficult to match, as there are many minor color variants, and the metallic is well laid out, there's no clumping, or modeling (zebra stripes), there's no orange peel (paint surface pitted like an orange peel), and they defiantly used plenty of flex additive. So an A+ for paint work.

 

Picture of it mounted yet?

 

You know, I am all for "Modding" up your Prii, however this mod I have to question.
A - Modern aircraft have a similar feature on the upper side of the wing. In flight the pilot hits a button, they pop up and disrupt the laminar flow of air across the wings. They are called "Speed Brakes" They tend to piss off Mr Bernoulli and his principle, and slow the airflow down!
B - Toyota spent many hours in wind tunnel tests to achieve a C/D of .028. I am sure there were many designs with a piece of plastic designed to disrupt the air flow, but they will look cool, and as such, the ideas were thoughtfully shredded in the classified documents shredder!
C - Why would you want to mess with the C/D, all it's gonna do is cost you money and mpg!

and yer gonna block the rear washer...... H'...
Just think how the rear washer fluid dispersal pattern will work with the wake vortice generator you are installing!

 

^^This. LOL

 

KK6PD - I totally agree with your concerns, they are certainly justified. This is what I've experienced:
A - Maybe so, but so far so good.
B - I think it looks cool, so I'm not concerned. Perhaps Toyota tried it, but felt it looked too sporty and so they removed it to keep the *appearance* of being eco-friendly.
C - So far no loss of MPG, but I should also admit that I drive 70-75 to keep up with the flow of I-270 traffic, so my MPG is already reduced from its maximum potential.

What I have noticed is that when it rains, with-out the spoiler the air flows directly with the rear window and as a result the airflow drys any rain on the rear window that may have accumulated when I was stopped at a red light. With the spoiler installed the airflow does not dry the rain on the rear window it just beads up because just like KK6PD pointed out, the airflow is directed away from the rear window. However there is no disruption to the fluid dispersal pattern in the rear washer nozzle. I actually think it sprays out even better now. I also think the rear window wiper works better as there is no airflow trying to lift the wiper off of the rear-window glass.
Maybe I should apply some rain-x to the rear glass... Now I really do need the 20" wiper blade on the rear window. Sigma where are you!? Where's my order!

 

Paint looks like a good match! Still think u should give up the wiper and mount it on the glass. jk