I just brewed my first lager, an Oktoberfest. However, my hydrometer broke, so I am not sure if what I have will be an Oktoberfest or a Vienna Lager. I've been getting 80-83% efficiency the last 5 brews (I should add that my past 5-10 brews have produced far, far better beer than my previous 2+ years of brewing, thanks in no small part to this and other forums), so I built a recipe that would be an Oktoberfest from 78-84% and would be a Vienna Lager from 70-78... whatever it is, I just hope it's delicious. I put a lot of effort into this one, even customizing my water to be similar to Munich water. Also, I ended up with almost 9 gal of sweet wort, so I did a 110 min boil to get the volume down to 5.5 gal. I didn't notice any activity this morning, but the fermometer reads that the carboy is at 48F. in about 10 days when I transfer, I will be lagering this beside last month's altbier and probably taking a 2-month break from brewing.