Contained within these pages are all the different goodies available for the 4XX, 4XXX, 5XX, 6XX, and some 7XX model Roombas.
Here's a new mod for changing from a 2 arm sidebrush to a 3 arm sidebrush on your 4XX, 4XXX and Dirt Dog. What's just a bit different is that a small dome has been added using epoxy. This may help prevent the build-up of hair and dust bunnies directly under the brush and instead, place the debris at the bottom of the dome.
You can order one of these 3 arm side brushes for your 4XX, 4XXX or Dirt Dog for $10 and $1.75 USPS shipping by clicking the Buy Now button and pay using paypal.
Here is a direct replacement for that faulty dc power jack in your iRobot robot. It will fit the printed circuit board in the 4XX, 4XXX, Dirt Dog, 500, 600, and 700 models. It is $3.25 plus $1.75 USPS shipping for a paypal total of only $5.