You might already know of this. I just came upon it this morning. I play the Drumnetics, but it appears this add-on makes the listed pedals smoother to play. Some pretty good endorsements listed.
http://www.canopusdrums.com/en/otherproducts/item/speedstar/
http://www.canopusdrums.com/en/otherproducts/item/speedstar/