I put them on my 1200 to get it to lay flatter and try and lighten up the steering, the Doo setup comes with taller ball joints and made it more like the RAS2 which kept the sled from lifting the inside ski better, which it did accomplish nicely, but came at the expense of more bump steer which I did not like.
I could stand up the spindle for easier steering, but it became very unstable setup like that, so I ended up set back to the RAS2 stock setup.
The winder front end already has taller spindles and higher roll center so this kit does nothing for that, and the Winder already steers far easier then the Doo's.
Save your money. I wouldn't even consider them myself after using them on the Doo. The Cat front end is dialed nicely with the QS3's.