maybe start with just adding 1/4 lb roasted and see what happens.
or do an even swap with the chocolate. 4.16 oz or whatever. Carafa II and chocolate are pretty similar, so having both, not sure.
12.64 oz Crystal 60L
12.64 oz Victory Malt
6.4 oz Carafa II
4.16 oz Roasted Malt
why the non-even measurements btw?