New to the forums here. Was hoping to get a little friendly advice. I brewed my first all-grain on 4/8/14, which was the 3 gallon BIAB 100% kolsch. I had a starting gravity of 1.034, which was a little lower than required (hopefully it was either due to having more than the 4 gallon pre-boil or taking the sample directly from the top of the wort while in the fermenter). Either way, it calls for 1-2 weeks in the primary, 1 week secondary. With tomorrow being exactly 2 weeks in the primary, does anyone have any insight to what the spec. gravity or brix should be before transferring to the secondary? Or for debate purposes, is a secondary ferment even necessary? My only concern is that I have quite a bit of headspace in my 6 1/2 gallon big mouth bubbler so I am worried about some off flavors. I understand with it being my first all-grain there will be some undesirables and things to work out, but any advice from here on forward is greatly appreciated.