Thanks for the replies. I'll check them. I have the part (after a long wait). It's not CSL OEM but very similar. Made in Germany and looks more like the BMW Motorsport part. It will run without a flap. Very good build quality. The tuner here who originally thought could do it, threw the towel on the Siemens ECU. I'll post pics and video when I have it installed.
Cheers...