Yeah, when i put mine on I took the stock griptape off then Cleaned the deck with some soap or Fairy liquid i cant remember then Dried it and stuck the griptape i had cut onto it.
Haha, stupid me, posterboard and what not. It only makes it harder, I didn't have poster board but I used paper instead and all it did was get stuck to the scooter. Then it ripped. So I just estimated and it's awesome.