Hi there. I'm brewing my first pilsner and have had it fermenting at about 8c for 4 weeks. It's dropped to about 1.014 from about 1.050. I'm planning on doing a diacetyl rest for a couple of days at about 18c (although it tastes quite good so may not need one). My question is how long should I perform the rest before racking to secondary and lagering? Should fermentation be complete before lagering or will it continue to ferment at lagering temp (was planning on about 4c)?