Well I did the flush today and put the new tank on (it's made in Italy by the way). I filled it with Peak yellow coolant. Flushing the coolant on this car is very easy. The system drains well and fills easily; the air works its way out very quickly. I'll attach a pic of the drain plug for those interested. It's on the driver's side, and requires that the felt aero cover to be removed. I also removed the foremost plastic aero cover just because I didn't want coolant splashing all over it as I drained the system. I'll update you guys on whether or not the coolant sludge reappears.