On my 6 string fretless, I had a set of Lo Riders .030 - .130 and was getting some buzz on my E, A, and D strings where I normally didn't. I thought this was weird as I know Lo Riders are a bit stiffer than Hi Beams (not higher tension, actually lower tension with the sets I have when compared on my rubberneck Ibanez). Today, get a set of Hi Beams in gauges .030 .040 .060 .080 .100 .125 and strung them on, and now there is no more buzz. I haven't touched the truss rod and haven't touched a bridge saddle and I am getting absolutely no buzz. Not only are these Hi Beams which are more flexible, but they are also a thinner gauge so they should also be lower tension than a thicker set of Lo Riders(but still higher tension than Lo Riders of similar gauges.) So what gives, were my Lo Riders bad... why am I able to get lower action on my fretless with the Hi Beams... I can't figure out why unless it's something specific to fretless bass, how the string vibrates against the wood or something. Ideas?