I second dialing back the black malt. maybe use a quarter pound or less if you want it to be suuuuper black, otherwise i'd cut it out. I'd also raise the roast barley and chocolate malt. I make more stouts than anything and I've found that oftentimes less is more, especially lower gravity brews. Also, if you're shooting for 1.065ish, I'd up the ibu a bit and use the centennials instead... I really like Nuggets in my oatmeal stouts but that's just a personal preference (I Love Centennials too). Cheers!