I've watch a mountain of youtube vids on the subject but today I stop at a new house where there was brickies and explained what i was doing, they were really happy to give me 10mins to explain some of my questions and give me the basic important concepts.
1) MAKE SURE your first layer is PERFECT, spend the time on that and the rest is easy, if you are wako on the first layer then the whole thing will be.
