use flat blades, and make sure they don't have knobs/nibs on the end that make that little plastic hold-down on the arm offset the blade. I'm using some I bought from Can-Tire but will change to the Costco Michelin in spring. I guess, as alternative, you could cut the piece off yje blade arm.
2000 323i ZSP/ZCW • ///MARK'D
(RIP '84 325e, '87 325e & '96 328i)