Marland,
When you have the time and want to get started, bring a head and come down on a weekend and I'll teach you how and why. As it's better to learn by doing and seeing how it effects the flow and knowing why you did it than to look at pictures and not know what there reasoning was behind it. There are really only a few areas to pay attention to and the rest is simple smoothing, but not too smooth. Roughness and irregularities in port texture can be a big help in making HP but wont show a flow increase or decrease.