I think a single block machine would be too much. Maybe focus on the number of Power Coils themselves.
Make it so only one physical Power Coil is needed per machine, but that physical coil is just a housing which contains 24 slots for upgrade components. It’ll essentially just be a storage block for coil upgrade components. Each upgrade increases the coils available power. This way it cuts out 23 meshes per machine and also allows for the new crafting station parts to be included with minimal impact.
This also covers future updates… either just increase the number of upgrade slots that a coil has, or add more powerful upgrade components for players to work towards.
You could also keep the existing 2 coil types… just reduce the number of upgrade slots that the basic coil has.