all fine and well swordsey ,but have u put any thought into how you are going to stop dorsal and pectoral fins of barbel snagging in mesh?that 2 me is a major consideration, as regardless of how well you design a net with water flow in mind, if barbel goes into net and snags fins whilst facing in opposite way to flow and water is getting forced over fish from behind surely suffocation would result?how many matchmen out-there want,or would go to the trouble or inconvenience of checking on fish part way through a 5 hour match?