I am rebuilding my curve from scratch because I messed it up and have lost it, so I want my newer version to be slower than my old one was. My older curve was a hardbiting 12-6 downer that was around 10mph slower than my fastball (around 66mph for curve, 75-76 for fastball). I throw harder now then when I last threw it, but I'm still looking to have a 15-17 mph difference with a big 12-6 break. I throw around 80, so I want this pitch to be at about 63-66, but whenever I throw it like I used to it is too hard at around 70. So what grips can I use to slow it down just a little bit? I was thinking either using the pointer finger up technique ala Josh Beckett, or going with a knucklecurve grip. What do you think I should do?