These sliders works for most keys. However, for large keys, you may have to drill the slider shell that's on your HHKB or Realforce. You cannot use these sliders for the space bar. And The left control on Realforce have different sliders than other keys.
cong314159Yeah, I just had the spacebar printed and it set me back $50. But I justify it as "I don't want to wait an indeterminate amount of time for someone to sell me a novatouch spacebar and it annoys me enough to spend $50 on it"