Yep. Affordable PCB prototypes makes a *lot* of projects more feasible. When it was $30 per boad with minimum $120 it was much less practicle than when it's $4 per board with minimum of $40.
Notice that the size is limitied to 4" X 4", but that's big enough to make any of the SIMMs or DIMMs we might want. It might be a bit short for a PDS or NuBus card. I'm not sure, I'd need to look at the connector dimensions again. But, for complicated PDS or NuBus cards one would like want to go four layers instead of two. Still, I think it would be workable to do an SE/30 PDS adapter card (to Daystar upgrade) in two layers, maybe. If the traces are short.