You could get the same spec sheet in the builder as you get when you upload..

You could assign Specific RCN nozzles specific commands (which port dose what)...

You could arrange sub assemblies order ... At will...

You could have a list of who you follow and who follows you on your homepage...

The ability to assign any part as the "cockpit" so if your design doesn't call for a premade cock pit you dont have to hide it and carry the extra 500 + lbs...

A generic engine like a rotator that has adjustable power and torque maybe even rpm..

... Silly dreams.