I heard that you can put hubstacks on a YYF DV888. But then I heard that it can ruin the axle hole and make the yoyo wobbly. So if I want to do it, should I use a PGM axle or an 888x axle? Please help!! 
Both are the same length.
yea both are the same length so it wouldent make much difference.
Just DONT DO IT. You will strip the threads if you have no modding experience. Just a word of caution.