I can't seem to get a good cast with any of my fly rods. I can hit about 50" with ease using a 5wt Orvis, 50' with a cheap 6-7wt, but it's a lot harder, and I can hit 70' with a good 8wt. 50' is plenty for trout fishing, but only 70' for bass and musky seems short. This is all double hauling weightless, and weight doesn't affect the cast on the 8wt, and I don't use weighted trout flies. I have the ability to spey cast with the 8wt but don't know how or what I need for it. How could I improve the length of my cast without a bigger or new rod?