Ok so I got this thing and I tried to fit it in between the grip and starter switch housing. It wasn't happening so I ground off the little lip on the inner ring like many people said they did. Now the little lip is completely gone and I can fit it in between the grip and switch housing but the grip still stays stuck open without even having locking the arm down. It's just too thick. I can't see how I'll be able to get this thing to work. Anyone else have the same problem and find a resolution? Thanks.