grind machine help


#1

i got a pgm and i got some ring shaped thingy and i have no idea wat there for


#2

http://www.youtube.com/watch?v=_buOZbPwULs

They are rings you put in the side for wieght.


#3

yupp I always keep mine on,I also got confused they add about 5 grams when in so it does make a difference,just one warning: they block the lip for thumb grinds so if you like those dont keep them on