Sandy Nelson-Large Trout, Fishing Glass and Rod Building

Sandy Nelson is an expert angler based in Scotland who specialises in targeting sizeable trout with a dry fly. 
He also has a deep understanding of fly rods and has built many over the years.
I learn a little about his favourite rod material and if I might be tempted to build my own fly rod.
This is a really interesting insight into the mind of a fly angler who thinks deeply about how to catch large trout and the rods that he so loves to build.