If I Was Going To Put Blu Tack In My Beyblade To Make It Heavier Plastic Beyblade Would It Be Considered Because There Will Be Many Advanatage E.g. Stronger Blade Longer Spin Time I Would Like To Know If There Would Be Anymore Advantages Or Disadvantages Thanks

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That's illegal modification.

If it involved third party brands aside from Beyblade to mod it...

EDIT: Or that

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