Captain Sim 2 wrote on Feb 8^th, 2013 at 11:08am:

Guys, please keep the conversation polite, this is a friendly forum. Thank you. Ron, have already sent the -300 to you :)

'please' added:

So PLEASE, finally, what IS included in the 773 extension pack? Different flight dynamics, different weights and fuel consumption from the base pack? Is it a different variant over all? Or is it a visual extension only?

THANKS again for clarifying ...