If you are going to put it ina carboy and airlock it, rack it on over. Might suprise you and take off again after you rack it. Think I would leave a little extra headspace, put the excess in another bottle and top it off after it sits for a few days. OSG of 1.070 should not be anywhere near high enough to kill the yeast off with alcohol. If it decides to keep fermenting, it will do it in your carboy. Arne.