All about experince mate, im only 23 and im still blown away by all the people on here. Few years ago i knew nothing and didt understand jack. But started learning by taking out a 1.6 engine on an old escort and just went from there. I have done head gasket on rover, gear box on frs, done all the pipe work on my skyline. But im still learning mate, alot of people on here are in ther 30s/40s/ so they got 10-20 years on us and imagine what you can learn in that time.