No problem, Mike. Just a warning, if you're installing the 294mm E420 front brake calipers, the rotor won't clear the ball joint unless you swap on either the E420 lower control arms (which have a different ball joint, for more clearance), or the E420 knuckle/spindle/hub assembly (which pushes the rotor out farther). You need about 6-7mm space between the back side of the rotor and the ball joint area (approx 3mm space on each side of the dust shield), same as stock. The only calipers that bolt on without mods are the 300mm units from the early SL500. The E420 rears work fine, but you'll need to cut the dust shield.

Side note - if you don't yet have stainless steel braided brake hoses, you can pick up a really nice set from WRXtra for about $90 including shipping. Photos of them installed on my car are at this link.