I have seen people put hubstacks on a Genesis yoyo that did not originally Have them. How do they do this?
P.S. Sorry about making so many hubstack posts 
I have a purple rain Genesis that is stacked. It is phenomenal in play as well as beauty!
Might be putting on bst to help fund some recent purchases :-\
Bump
You buy a longer axle and pretty much forcefully push the axle past the nub. Works on the models where it has the hole near the axle. You then need a hubstack grind machine and you steal the stacks from there and sand it down. You can then hubstack your genesis while decreasing it’s value 
Unless you do it right and actually get someone like Ricerocket or Landon to mill some real ones.