I have a hybrid roggenbock (calling it the doppelroggen) brewing right now using wyeast 3711, and after two weeks it' only reached 79% apparent attenuation (from 1.076 to 1.016). Wyest says 77 to 83% attenuation, but every thing I've read about 3711 suggests that it will ferment down to single digits quite quickly regardless of the starting gravity. I've kept temps right around 74°. Should I just let it ride for a while or do you think it might be about done? It does have a pound of crystal rye in it, but I'm not sure if that acts like typical crystal malts...?