A see-through electronics housing; our 5V battery connector was a bit loose. Circuit debugging would be a lot quicker.
On top of making a structurally sound boat & controller, design for Manufacturing and Assembly (DFMA) — you will save hours if you can quickly remove components and put them back together
Get some sleep; some problems are only debuggable after proper rest.
Spend some time having fun with this project — you won't regret it.
When hot glue gets hot enough, it melts straight through pink foam :(