How to mod yo-yo's?

Yo-Yo Tricks
1

So can you guys give me hints on how to Mod the Dark Magic and if it’s possible how to Mod the velocity. And just a side question what do think of the Legacy?

2

Shouldnt this be in the Mod section.

3

Also, this should be in the mod section.  And try to post another topic about the legacy, you’ll get better results that way.