Product review (5 stars): Perfect fit for my Kitchenaid Superba
Perfect fit for my Kitchenaid Superba, we lived with food particles for waaaay too long before I figured out this was broken, 10 minute job and we're back in business.  One tip I picked up from an appliance repair video, wedge a 7/16 wrench between the blade and the screen when you slide it in, then slip the wrench out, the blade is fixed on a spring loaded shaft and when you slip the wrench out it will pop right into position.  I did notice some metal shavings in an upturned bowl during my first test run of the dishwasher, guessing from the blade making its first few passes over the grate, but this hasn't shown up again in subsequent wash cycles.  Wish I had figured this out sooner!