Reply to Question about expanding the midi fighter

I wanted to know how much electronics knowledge I would to add the extra buttons, knobs and faders to the midi fighter? I have been studying up on basic electronics and I have a basic understanding of the midi fighter schematic.

And what other parts besides the faders, buttons and knobs would I need? I know the obvious, the wires. But would I need other parts as well?

I know how to and delsolder solder parts from my personal experience refurbishing 1200s.

*add
In the schematic, I see the 10k resistors for the buttons. and they seem to be wired in parallel