Just getting into brewing. I have an empty freezer in my garage that was here when I moved in. Thinking about buying dig temp controller from northern brewer (A419). Is it as easy as plugging the fridge into the controller and setting the temp??? If so this would be great for me. I brewed a Scottish ale kit a few weeks back not knowing it recommends aging in secondary at 48 degrees. Right now it's at 65 and I want to make sure the beer comes out right.