In my research this is actually a GC II which did come with Superspeeds. The old ones I took off were correct size. The new ones were 1/16" wider which makes the table smaller. Mine has adjustable feet and hidden nut, not figure 8 for the rails. Everything tells me GCII. But I could be wrong as I have been in the past LOL. I'm pretty sure you know more about these than I do.