I recently got a custom anodized (Gruntbull) Skyline from Businessnow in trade. It had nubs on it when I got it. Of course I had to outfit it with some Ricestacks! They are called Lathyrus.
I also recently received a Yuuki Quake 888 from See Bass. It had no stacks either, so I threw a set of Purple Velvet stacks on there
What I think to be a Jason Lee 888 B Grade with Ninja Ricestacks
This last one is my Augie 888. Love the yoyo, just not sure about the Silver Tetra stacks. Might have to keep looking for that perfect match