what are z stacks for the ones on the G5. whats the diffrence. are they better. every thing ineed to know about them please tell
THANKS 
z stacks are an upgrade kit for hubstacks. They are specifically built for g5 and use of them on any other yoyo affects the yoyo’s performance. They are same as hubstacks but provide bigger area to catch the yoyo.
Yep, they are just hubstacks with a bigger circle, more surface area. So its easier to catch, just like what Mfea said.
cool thanks 