Ok, basically, I've been wondering for some time if it's possible to make Beyblades (just some plastic ones, I don't wanna mess with my HMS / MF blades.) much, much stronger modifying then with home made parts (doesn't matter if they're against the rules, I just mess around with friends)?
I've thought of sanding down bases to make them more agressive (flat, I've tried this), or adding extra weight disks of some sort to increases weight, but no other particularly decent ideas come to mind. Any thought's on this?

Hm, we will not discuss illegal modifications, unless you come up with your own, and post results and pictures in the Your Creations forum.

Obviously almost all illegal modifications have already been tried by multiple kids ...