yea the black keycaps are from the scorpius. The F key caps are all the game size. I replaced the "clear" key w/ the "num lock" key from the scorpius and the num lock is larger than the clear since they were on different rows.
i just replaced esc, f4, f8, f13 (w/ print screen), f14 (w/ scroll lock), f15 (w/ pause).
the black helps break up the function keys for me so i can hit alt + f4 easier.