Not as smooth as hoped

The ergonomics are good. General use movement is smooth. Precision gaming use is jittery. The movement jitters a bit when making small adjustments. Cleaning the ball and bearings doesn't fully resolve the issue. Also, the scroll wheel isn't consistent. Sometimes one click = one action. Other times it may take 2 or 3 detent clicks. The ELECOM website supposedly has mouse software to allow the extra buttons to be programmed but the download link is broken on the site. I bought this over the Logitec as this was a little cheaper and i had good results with the ELECOM Huge finger trackball but now i wonder if the Logitec would have been better.

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