I have moved onto the blackberry like climbers that we have trained up in the fruit cage. I think the first thing you need to do is just have a good look at the plant. Of course it is good to know your plant that you are pruning but by looking you can see what the plant needs. After looking at the plant the next thing I do is take out any old or dead wood. Then open up the plant to allow for new wood and the plant to see the light then tie in the rest to keep its form in the summer, these berries need support. This photo is the berry before pruning, I will send an after next week.