If you wish to share a specific implementation of a seastead component, or perhaps and entire platform, create the page under your username, then link to it from here from the appropriate category.
For example, if you have a plan for a complete hybrid power system, create a page called "User:MyUsername/10_Kilowatt_Integrated_Power_System"
User design pages should be left to the original creator. Only make changes for things like spelling/math, and only if you're sure you're right.
Otherwise, criticize or comment on the proposal in the articles talk page.
- Overview - Describe the system you've designed.
- Conditional Requirements - e.g. "This power system requires the platform to be very stable."
- Costs - Breakdown of cost estimates and a total if possible.
- Material Availability - Where to get the items necessary for the system.