Aerodynamics / Aerodynamic Cost / Aero parts

If I told you... I'd have to kill you.

I want to swap the bodged FD for a neater chainguide solution.
I've got a carbon ring to fit my current cranks to replace the cheapie on there.
I'm going to try new tyres
I'm using single-ring so should lose the FD shifter cable - might just pack it into the extension.
I want a nice way of hiding my Di2 charge box.
I want to test Aerocoach trip socks vs. my current calf guards.
I'll be doing some aero testing and might try Aerocoach armrests if it helps me hold position.
Getting into less bang for buck areas...
Might cough up for those bigger jockey wheels and waxed chains or at least clean my current stuff :)
Find more aero shoes - looks like Giro Empires will work midfoot and should be a bit faster than my current Shimanos. Those crazy aero Bonts are too skinny I think.
Train better.

Anything else I should try?