I brewed a red ale a 13 days ago. Starting gravity was 1.061 and finish gravity was 1.015. On tuesday I checked and the gravity was already down to 1.015. I am about to check it again and if it is still down at 1.015 is there any reason I can't stick this in a keg tonight or should I wait another week? I am planning on letting it age a moth in a keg.