Due to having more input and outputs pins, this board is the best choice for the Keymmodore Project if you want to have less work on the wiring. With this board keyboard and joysticks have their own separate pins.
Also, another nice feature, is the fact that the C-64 Keyboard connector can be plug directly to the board, there is no need to extensions or adaptors.
The resistors value for the LEDs can change. I choose those looking for colors not being too bright but also uniform. Don’t forgert to insert the resistor for the power LED in case you go for that choice.
The drawing of the DB-9 connectors are inverted to make the diagram easier to read. Look at the corresponding pin numbers.