The design workflow for the lone developer For my own projects, I prefer a different workflow 1- Lay out the schematics with the most important components 2- Draft mechanics and place core components 3- Add more items to the schematic diagram 4- Adjust mechanics if needed 5- Place and route the new items 6- Goto 3 7- Add anything optional that may be useful and fits mechanics 8- Place and route these extra things 9- Goto 7 10- Remove unused "options" before the mounting step You really don't want solder alloy on your free pads Everything must be performed with later steps in mind