GSP on Overflow

[UDflyer00]

Okay, so i was all excited when my GSP finally started to cover my Overflow box on my 65, but now it's almost near the top!!  How can I best trim it down?  Just a sharp knife or razorblade?  This is my first time so any input is greatly appreciated.

Thanks,
Mark

[Mussin]

Just cut or scrape it and it might just peel off. 

[Travis8896]

Just use a sharp blade that way u don't peel it back to far plus by using  a sharp blade u can cut it into any sized frag u want to