Hello again....for all out top speed nothing beats the rigger. Built light, strong and adjustable it's the way to go if speed is what you're after. Having said that, they are the most difficult to set up, and are usually designed to turn only one way - straight line speed is the main aim here. Have a look at Taylor's builds - he's one of the rigger gurus here and can surely tell you much more about them than I can.

Best