I'm making 5.5 gal RIS as I write this but I messed up along the way and ended up 13+ gal of low SG wort, now after 2h boil I have 11 gal at 1.060. Looks like I will have to boil it for 4 more hours to get down to volume I need, is there an adverse effect of such a long boil (6-7h total?), should I just start my hops addition now and endup with strong stout instead??