[K.Porter]

As the previous posters have said, think about the wiring a little bit more before committing to this design.
It might look good on paper, but just looking at your Spike relays, I'm seeing problems. If you're using the basic crimp on connectors to wire those, the connectors protrude from the connection point another centimeter or two, which will lead to some problems in the current design. You can solve this by rotating the relays all 90 degrees...but things will still be close.

A nice and compact design might look great on paper, but I know from experience what a mess wiring can make when you don't take it all into account. Nothing's worse for serviceability than a tangled mess of power and signal cables when you have to run them all in the same little space.

You might be able to make your current board layout work...but just make sure the components are facing the right way, so you can make the wires go where they need to without problems.