From reading posts about homemade tensioners, it really seems like a lot of folks are high on using skateboards wheels instead of sprockets on tensioners. Can someone explain to me the benefit of a roller wheel over a sprocket designed to roll chain? Seems like the milled skate wheel options would still ad resistance and buzz as the irregular shape of the chain lumps over it. Seems like there are a lot of options out there for idler sprockets for go karts, farm implements etc. Why aren't people using them? Is it just that a wheel is "good enough" and cheap?