I have filed off the teeth on both size figure 9s I have. The big ones I have I used to hang my Hennessey and the smalls I use on my tarp. I found that as long as the V cut squeezes the cord you are good. I always put a half hitch or an extra wrap for just in case but have never had any issues.
Yosemite Sam: Are you trying to make me look a fool?
Bugs: You don't need me to make you look like a fool.
Yosemite Sam: Yer deerrrnnn right I don't!