tis a bit high for a Kolsch IMO, but as far as the beer itself, I think you're fine.
many many years ago they didn't even use airlocks. they just put fabric like cheesecloth over the top of the fermenter. see: open fermentation.
Primary: English Mild
On tap: Pale Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
Gal in 2009: 27, Gal in 2010: 34, Gal in 2011: 13, Gal in 2012: 10