Bit the bullet and ordered the Calmers. They have a 10 blade and a 12 blade version for the 612c new style. I went with the 10 blade cause I'm a cheapskate plus they didn't have enough of the 12 blade in stock. Thanks to everyone for the comments.

Someone mentioned a slow down kit-that's for the 90 series. I didn't ask when the discounts went off but the website says order before FPS.