Sushi Rocket

This is my sushi cargo rocket circuit design.

1. The Landing pad sets desired inventory in constant combinator.
2. Landing pad sends a green signal if inventory is less then 50% of desired amount.
3. Launch area loads items only if rocket is built.
4. Launch area loads items only if the landing area is powered.
5. Launch area generates its own green signal if there are no more items to load.
6. Rocket only launches if both the launch site and the landing site are green.

So this addresses common problems including power outages at the landing site causing too many items to be loaded and supply shortages at the launch site causing empty rockets to be sent.