Welcome to the forum and congrats to your great car

Regarding shedding off weight you're on the right track. Although your glass engine bonnet is pretty heavy too. The carbon parts do not help in weight and are for looks only unless you get rid of the insides of the doors like the SL probably will have. Otherwise your current wheels are the heavy ones but you already ordered some. Then get the usual stuff like air filters, intake pipe and a ECU/TCU tune and your at 10.5.

Greets from the opposite of the world (Switzerland)