I am brewing AHS kolsch extract kit. I added 1% alcohol boost. OG was 1.058. It has been in primary for five days. Really took off after about 12 hours. I took a gravity reading today and it was 1.018(kit says final should be 1.014). It's not bubbling much any more, maybe one bubble every 20 seconds or so. Just wondering when I should rack to secondary? Yeast is safeale k-97.