The Twinsonic fired right up! No burnt bulbs and the motor sounds great! i washed it down and all the chrome came out beautiful, as did the blue dome. Luckily I had a red dome laying around that's also pretty nice, so I got that installed real quick and it looks good as new. I'll be putting a longer harness on it, and replacing the speaker which someone removed, and it will be good to go.
The first Aero tested had the longest harness coming out, a little less than a foot. Two bulbs out, one red flasher and one red rotator. But the motor and gears are unbelievably quiet and smooth. This one will be easy to fix up. I'll be tearing into the other three once my wiring order comes in with more connectors and wire.