Being new to sea fishing I have purchased a decent rod and multiplier reel with a view to catching Tuna, shark etc at some point. I spoke to the guy at BCF who was helpful and reccomended a rod and reel combo and also suggested the line most suitable. I filled the reel up keeping the line under reasonable pressure and every time I cast, despite putting my finger on the line as soon as the bait touches the water, the reel overuns even on a gentle cast. If I cast with any force at all it goes into a birds nest of mono - have I made a basic mistake? Any advice from you experienced multiplier users would be much appreciated.