And if you can get to a LHBS or order a blowoff tube soon, that would be a good idea with so little headspace. A blown up carboy is a very baaaad thing. And 3/8" tubing fouls rather easily.
Give a man a beer, waste an hour. Teach a man to brew, and waste a lifetime! Bill Owen quote
Why does Happy Hour limit happiness to 1/24 of the day?