I find is hard to blame the X3 as I'm not convinced your heel pivot method is totally safe. If you need to brake extra hard unexpectedly you'll have you foot skewed on the brake pedal and may not be able to use optimal pressure or control.
Edit - I've just analysed what I do and I do heel pivot......so apologies for my above comment. My heel is in line with the brake and I pivot to the accelerator. I have no issues with chunky shoes but I'm fairly typical at UK size 10, US size 11. I can see that bigger shoe sizes could be tight.
F25 35D | MSport | Space Grey | Saddle | Burr Walnut | VDC | Reversing Camera | Xenons | Panoramic Roof | Matt Aluminium Roof Rails & Window Trim
Last edited by clivem2; 11-26-2012 at 08:27 AM.