Looks like a variableresistance stomach training belt . The bottom is springloaded you tighten your stomach muscles to push against the piston . The golflike appearance of the knob is a coincidence . <| sep |> Update Nope . Takes me back to the same pages I ' ve seen before . If I put my username into the register a free account field , it tells me my name is taken . by me , of course , I ' ve logged back into my account on the web And when I go to manage my account it offers no free option . Thanks for your reply , though . <| sep |> I think it does a better job at highlighting the updown arrows while maintaining the classic s shape . Edit the other post feedback edits from ukimbalim are also really nice . <| sep |> Was that when we used teamspeak ?